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NASA’s Zero-Boil-Off Tank Experiments To Enable Long-Duration Space Exploration

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Thursday, March 14, 2024

Figure 1. The Gateway space station—humanity’s first space station around the Moon—will be capable of being refueled in space. Credit: NASA, Alberto Bertolin, Bradley ReynoldsNASA’s Zero-Boil-Off Tank experiments address the challenge of managing cryogenic propellants in space, crucial for future Moon and Mars missions, with potential Earth-bound benefits in hydrogen energy applications.Do we have enough fuel to get to our destination? This is probably one of the first questions that comes to mind whenever your family gets ready to embark on a road trip. If the trip is long, you will need to visit gas stations along your route to refuel during your travel.NASA is grappling with similar issues as it gets ready to embark on a sustainable mission back to the Moon and plans future missions to Mars. But while your car’s fuel is gasoline, which can be safely and indefinitely stored as a liquid in the car’s gas tank, spacecraft fuels are volatile cryogenic liquid propellants that must be maintained at extremely low temperatures and guarded from environmental heat leaks into the spacecraft’s propellant tank. And while there is already an established network of commercial gas stations in place to make refueling your car a cinch, there are no cryogenic refueling stations or depots at the Moon or on the way to Mars. Furthermore, storing volatile propellant for a long time and transferring it from an in-space depot tank to a spacecraft’s fuel tank under microgravity conditions will not be easy since the underlying microgravity fluid physics affecting such operations is not well understood. Even with today’s technology, preserving cryogenic fuels in space beyond several days is not possible and tank-to-tank fuel transfer has never been previously performed or tested in space.Propellant Management in Space: Overcoming Boil-OffHeat conducted through support structures or from the radiative space environment can penetrate even the formidable Multi-Layer Insulation (MLI) systems of in-space propellant tanks, leading to boil-off or vaporization of the propellant and causing tank self-pressurization. The current practice is to guard against over-pressurizing the tank and endangering its structural integrity by venting the boil-off vapor into space.Onboard propellants are also used to cool down the hot transfer lines and the walls of an empty spacecraft tank before a fuel transfer and filling operation can take place. Thus, precious fuel is continuously wasted during both storage and transfer operations, rendering long-duration expeditions—especially a human Mars mission—infeasible using current passive propellant tank pressure control methods.Introducing ZBO: A New Horizon in Fuel EfficiencyZero-Boil-Off (ZBO) or Reduced Boil-Off (RBO) technologies provide an innovative and effective means to replace the current passive tank pressure control design. This method relies on a complex combination of active, gravity-dependent mixing and energy removal processes that allow maintenance of safe tank pressure with zero or significantly reduced fuel loss.Zero Boil-off Storage and Transfer: A Transformative Space TechnologyAt the heart of the ZBO pressure control system are two proposed active mixing and cooling mechanisms to counter tank self-pressurization. The first is based on intermittent, forced, subcooled jet mixing of the propellant and involves complex, dynamic, gravity-dependent interaction between the jet and the ullage (vapor volume) to control the condensation and evaporation phase change at the liquid-vapor interface.The second mechanism uses subcooled droplet injection via a spraybar in the ullage to control tank pressure and temperature. While the latter option is promising and gaining prominence, it is more complex and has never been tested in microgravity where the phase change and transport behavior of droplet populations can be very different and nonintuitive compared to those on Earth.Although the dynamic ZBO approach is technologically complex, it promises an impressive advantage over the currently used passive methods. An assessment of one nuclear propulsion concept for Mars transport estimated that the passive boil-off losses for a large liquid hydrogen tank carrying 38 tons of fuel for a three-year mission to Mars would be approximately 16 tons/year. The proposed ZBO system would provide a 42% saving of propellant mass per year.These numbers also imply that with a passive system, all the fuel carried for a three-year Mars mission would be lost to boil-off, rendering such a mission infeasible without resorting to the transformative ZBO technology.The ZBO approach provides a promising method, but before such a complex technological and operational transformation can be fully developed, implemented, and demonstrated in space, important and decisive scientific questions that impact its engineering implementation and microgravity performance must be clarified and resolved.The Zero-Boil-Off Tank (ZBOT) Microgravity Science ExperimentsThe Zero Boil-off Tank (ZBOT) Experiments are being undertaken to form a scientific foundation for the development of the transformative ZBO propellant preservation method. Following the recommendation of a ZBOT science review panel comprised of members from aerospace industries, academia, and NASA, it was decided to perform the proposed investigation as a series of three small-scale science experiments to be conducted onboard the International Space Station. The three experiments outlined below build upon each other to address key science questions related to ZBO cryogenic fluid management of propellants in space.Figure 2. Astronaut Joseph M. Acaba installing ZBOT Hardware in the Microgravity Science Glovebox aboard the International Space Station. Credit: NASAThe ZBOT-1 Experiment: Self-Pressurization & Jet MixingThe first experiment in the series was carried out on the station in the 2017-2018 timeframe. Figure 2 shows the ZBOT-1 hardware in the Microgravity Science Glovebox (MSG) unit of the station. The main focus of this experiment was to investigate the self-pressurization and boiling that occurs in a sealed tank due to local and global heating, and the feasibility of tank pressure control via subcooled axial jet mixing. In this experiment, the complicated interaction of the jet flow with the ullage (vapor volume) in microgravity was carefully studied.Microgravity jet mixing data was also collected across a wide range of scaled flow and heat transfer parameters to characterize the time constants for tank pressure reduction, and the thresholds for geyser (liquid fountain) formation, including its stability, and penetration depth through the ullage volume. Along with very accurate pressure and local temperature sensor measurements, Particle Image Velocimetry (PIV) was performed to obtain whole-field flow velocity measurements to validate a Computational Fluid Dynamics (CFD) model.Figure 3. Validation of ZBOT CFD Model Predictions for fluid flow and deformation of a spherical ullage in microgravity by a subcooled liquid jet mixing against ZBOT experimental results: (a) Model prediction of ullage position and deformation and flow vortex structures during subcooled jet mixing; (b) PIV image capture of flow vortex structures during jet mixing; (c) Ullage deformation captured by white light imaging; and (d) CFD model depiction of temperature contours during subcooled jet mixing. (ZBOT-1 Experiment, 2018) Credit: Dr. Mohammad Kassemi, Case Western Reserve UniversitySome of the interesting findings of the ZBOT-1experiment are as follows:Provided the first tank self-pressurization rate data in microgravity under controlled conditions that can be used for estimating the tank insulation requirements. Results also showed that classical self-pressurization is quite fragile in microgravity and nucleate boiling can occur at hotspots on the tank wall even at moderate heat fluxes that do not induce boiling on Earth.Proved that ZBO pressure control is feasible and effective in microgravity using subcooled jet mixing, but also demonstrated that microgravity ullage-jet interaction does not follow the expected classical regime patterns (see Figure 3).Enabled observation of unexpected cavitation during subcooled jet mixing, leading to massive phase change at both sides of the screened Liquid Acquisition Device (LAD) (see Figure 4). If this type of phase change occurs in a propellant tank, it can lead to vapor ingestion through the LAD and disruption of liquid flow in the transfer line, potentially leading to engine failure.Developed a state-of-the-art two-phase CFD model validated by over 30 microgravity case studies (an example of which is shown in Figure 3). ZBOT CFD models are currently used as an effective tool for propellant tank scaleup design by several aerospace companies participating in the NASA tipping point opportunity and the NASA Human Landing System (HLS) program.Figure 4. White light image captures of the intact single hemispherical ullage in ZBOT tank before depressurization by the subcooled jet (left) and after subcooled jet mixing pressure collapse that led to massive phase change bubble generation due to cavitation at the LAD (right). (ZBOT-1 Experiment, 2018). Credit: Dr. Mohammad Kassemi, Case Western Reserve UniversityThe ZBOT-NC Experiment: Non-Condensable Gas EffectsNon-condensable gases (NCGs) are used as pressurants to extract liquid for engine operations and tank-to-tank transfer. The second experiment, ZBOT-NC will investigate the effect of NCGs on the sealed tank self-pressurization and on pressure control by axial jet mixing. Two inert gases with quite different molecular sizes, Xenon, and Neon, will be used as the non-condensable pressurants. To achieve pressure control or reduction, vapor molecules must reach the liquid-vapor interface that is being cooled by the mixing jet and then cross the interface to the liquid side to condense.This study will focus on how in microgravity the non-condensable gases can slow down or resist the transport of vapor molecules to the liquid-vapor interface (transport resistance) and will clarify to what extent they may form a barrier at the interface and impede the passage of the vapor molecules across the interface to the liquid side (kinetic resistance). By affecting the interface conditions, the NCGs can also change the flow and thermal structures in the liquid.ZBOT-NC will use both local temperature sensor data and uniquely developed Quantum Dot Thermometry (QDT) diagnostics to collect nonintrusive whole-field temperature measurements to assess the effect of the non-condensable gases during both self-pressurization heating and jet mixing/cooling of the tank under weightlessness conditions. This experiment is scheduled to fly to the International Space Station in early 2025, and more than 300 different microgravity tests are planned. Results from these tests will also enable the ZBOT CFD model to be further developed and validated to include the non-condensable gas effects with physical and numerical fidelity.The ZBOT-DP Experiment: Droplet Phase Change EffectsZBO active pressure control can also be accomplished via injection of subcooled liquid droplets through an axial spray-bar directly into the ullage or vapor volume. This mechanism is very promising, but its performance has not yet been tested in microgravity. Evaporation of droplets consumes heat that is supplied by the hot vapor surrounding the droplets and produces vapor that is at a much lower saturation temperature. As a result, both the temperature and the pressure of the ullage vapor volume are reduced. Droplet injection can also be used to cool down the hot walls of an empty propellant tank before a tank-to-tank transfer or filling operation. Furthermore, droplets can be created during the propellant sloshing caused by acceleration of the spacecraft, and these droplets then undergo phase change and heat transfer. This heat transfer can cause a pressure collapse that may lead to cavitation or a massive liquid-to-vapor phase change. The behavior of droplet populations in microgravity will be drastically different compared to that on Earth.The ZBOT-DP experiment will investigate the disintegration, coalescence (droplets merging together), phase change, and transport and trajectory characteristics of droplet populations and their effects on the tank pressure in microgravity. Particular attention will also be devoted to the interaction of the droplets with a heated tank wall, which can lead to flash evaporation subject to complications caused by the Liedenfrost effect (when liquid droplets propel away from a heated surface and thus cannot cool the tank wall). These complicated phenomena have not been scientifically examined in microgravity and must be resolved to assess the feasibility and performance of droplet injection as a pressure and temperature control mechanism in microgravity.Back to Planet EarthThis NASA-sponsored fundamental research is now helping commercial providers of future landing systems for human explorers. Blue Origin and Lockheed Martin, participants in NASA’s Human Landing Systems program, are using data from the ZBOT experiments to inform future spacecraft designs.Cryogenic fluid management and use of hydrogen as a fuel are not limited to space applications. Clean green energy provided by hydrogen may one day fuel airplanes, ships, and trucks on Earth, yielding enormous climate and economic benefits. By forming the scientific foundation of ZBO cryogenic fluid management for space exploration, the ZBOT science experiments and CFD model development will also help to reap the benefits of hydrogen as a fuel here on Earth.Project LeadDr. Mohammad Kassemi (Dept Mechanical & Aerospace Engineering, Case Western Reserve University)Sponsoring OrganizationBiological and Physical Sciences (BPS) Division, NASA Science Mission Directorate (SMD)

NASA’s Zero-Boil-Off Tank experiments address the challenge of managing cryogenic propellants in space, crucial for future Moon and Mars missions, with potential Earth-bound benefits in...

Gateway Space Station Full Configuration

Figure 1. The Gateway space station—humanity’s first space station around the Moon—will be capable of being refueled in space. Credit: NASA, Alberto Bertolin, Bradley Reynolds

NASA’s Zero-Boil-Off Tank experiments address the challenge of managing cryogenic propellants in space, crucial for future Moon and Mars missions, with potential Earth-bound benefits in hydrogen energy applications.

Do we have enough fuel to get to our destination? This is probably one of the first questions that comes to mind whenever your family gets ready to embark on a road trip. If the trip is long, you will need to visit gas stations along your route to refuel during your travel.

NASA is grappling with similar issues as it gets ready to embark on a sustainable mission back to the Moon and plans future missions to Mars. But while your car’s fuel is gasoline, which can be safely and indefinitely stored as a liquid in the car’s gas tank, spacecraft fuels are volatile cryogenic liquid propellants that must be maintained at extremely low temperatures and guarded from environmental heat leaks into the spacecraft’s propellant tank. And while there is already an established network of commercial gas stations in place to make refueling your car a cinch, there are no cryogenic refueling stations or depots at the Moon or on the way to Mars.

Furthermore, storing volatile propellant for a long time and transferring it from an in-space depot tank to a spacecraft’s fuel tank under microgravity conditions will not be easy since the underlying microgravity fluid physics affecting such operations is not well understood. Even with today’s technology, preserving cryogenic fuels in space beyond several days is not possible and tank-to-tank fuel transfer has never been previously performed or tested in space.

Propellant Management in Space: Overcoming Boil-Off

Heat conducted through support structures or from the radiative space environment can penetrate even the formidable Multi-Layer Insulation (MLI) systems of in-space propellant tanks, leading to boil-off or vaporization of the propellant and causing tank self-pressurization. The current practice is to guard against over-pressurizing the tank and endangering its structural integrity by venting the boil-off vapor into space.

Onboard propellants are also used to cool down the hot transfer lines and the walls of an empty spacecraft tank before a fuel transfer and filling operation can take place. Thus, precious fuel is continuously wasted during both storage and transfer operations, rendering long-duration expeditions—especially a human Mars mission—infeasible using current passive propellant tank pressure control methods.

Introducing ZBO: A New Horizon in Fuel Efficiency

Zero-Boil-Off (ZBO) or Reduced Boil-Off (RBO) technologies provide an innovative and effective means to replace the current passive tank pressure control design. This method relies on a complex combination of active, gravity-dependent mixing and energy removal processes that allow maintenance of safe tank pressure with zero or significantly reduced fuel loss.

Zero Boil-off Storage and Transfer: A Transformative Space Technology

At the heart of the ZBO pressure control system are two proposed active mixing and cooling mechanisms to counter tank self-pressurization. The first is based on intermittent, forced, subcooled jet mixing of the propellant and involves complex, dynamic, gravity-dependent interaction between the jet and the ullage (vapor volume) to control the condensation and evaporation phase change at the liquid-vapor interface.

The second mechanism uses subcooled droplet injection via a spraybar in the ullage to control tank pressure and temperature. While the latter option is promising and gaining prominence, it is more complex and has never been tested in microgravity where the phase change and transport behavior of droplet populations can be very different and nonintuitive compared to those on Earth.

Although the dynamic ZBO approach is technologically complex, it promises an impressive advantage over the currently used passive methods. An assessment of one nuclear propulsion concept for Mars transport estimated that the passive boil-off losses for a large liquid hydrogen tank carrying 38 tons of fuel for a three-year mission to Mars would be approximately 16 tons/year. The proposed ZBO system would provide a 42% saving of propellant mass per year.

These numbers also imply that with a passive system, all the fuel carried for a three-year Mars mission would be lost to boil-off, rendering such a mission infeasible without resorting to the transformative ZBO technology.

The ZBO approach provides a promising method, but before such a complex technological and operational transformation can be fully developed, implemented, and demonstrated in space, important and decisive scientific questions that impact its engineering implementation and microgravity performance must be clarified and resolved.

The Zero-Boil-Off Tank (ZBOT) Microgravity Science Experiments

The Zero Boil-off Tank (ZBOT) Experiments are being undertaken to form a scientific foundation for the development of the transformative ZBO propellant preservation method. Following the recommendation of a ZBOT science review panel comprised of members from aerospace industries, academia, and NASA, it was decided to perform the proposed investigation as a series of three small-scale science experiments to be conducted onboard the International Space Station. The three experiments outlined below build upon each other to address key science questions related to ZBO cryogenic fluid management of propellants in space.

Astronaut Joseph Acaba Installing ZBOT Hardware

Figure 2. Astronaut Joseph M. Acaba installing ZBOT Hardware in the Microgravity Science Glovebox aboard the International Space Station. Credit: NASA

The ZBOT-1 Experiment: Self-Pressurization & Jet Mixing

The first experiment in the series was carried out on the station in the 2017-2018 timeframe. Figure 2 shows the ZBOT-1 hardware in the Microgravity Science Glovebox (MSG) unit of the station. The main focus of this experiment was to investigate the self-pressurization and boiling that occurs in a sealed tank due to local and global heating, and the feasibility of tank pressure control via subcooled axial jet mixing. In this experiment, the complicated interaction of the jet flow with the ullage (vapor volume) in microgravity was carefully studied.

Microgravity jet mixing data was also collected across a wide range of scaled flow and heat transfer parameters to characterize the time constants for tank pressure reduction, and the thresholds for geyser (liquid fountain) formation, including its stability, and penetration depth through the ullage volume. Along with very accurate pressure and local temperature sensor measurements, Particle Image Velocimetry (PIV) was performed to obtain whole-field flow velocity measurements to validate a Computational Fluid Dynamics (CFD) model.

Validation of ZBOT CFD Model Predictions

Figure 3. Validation of ZBOT CFD Model Predictions for fluid flow and deformation of a spherical ullage in microgravity by a subcooled liquid jet mixing against ZBOT experimental results: (a) Model prediction of ullage position and deformation and flow vortex structures during subcooled jet mixing; (b) PIV image capture of flow vortex structures during jet mixing; (c) Ullage deformation captured by white light imaging; and (d) CFD model depiction of temperature contours during subcooled jet mixing. (ZBOT-1 Experiment, 2018) Credit: Dr. Mohammad Kassemi, Case Western Reserve University

Some of the interesting findings of the ZBOT-1experiment are as follows:

  1. Provided the first tank self-pressurization rate data in microgravity under controlled conditions that can be used for estimating the tank insulation requirements. Results also showed that classical self-pressurization is quite fragile in microgravity and nucleate boiling can occur at hotspots on the tank wall even at moderate heat fluxes that do not induce boiling on Earth.
  2. Proved that ZBO pressure control is feasible and effective in microgravity using subcooled jet mixing, but also demonstrated that microgravity ullage-jet interaction does not follow the expected classical regime patterns (see Figure 3).
  3. Enabled observation of unexpected cavitation during subcooled jet mixing, leading to massive phase change at both sides of the screened Liquid Acquisition Device (LAD) (see Figure 4). If this type of phase change occurs in a propellant tank, it can lead to vapor ingestion through the LAD and disruption of liquid flow in the transfer line, potentially leading to engine failure.
  4. Developed a state-of-the-art two-phase CFD model validated by over 30 microgravity case studies (an example of which is shown in Figure 3). ZBOT CFD models are currently used as an effective tool for propellant tank scaleup design by several aerospace companies participating in the NASA tipping point opportunity and the NASA Human Landing System (HLS) program.
Intact Single Hemispherical Ullage in ZBOT Tank

Figure 4. White light image captures of the intact single hemispherical ullage in ZBOT tank before depressurization by the subcooled jet (left) and after subcooled jet mixing pressure collapse that led to massive phase change bubble generation due to cavitation at the LAD (right). (ZBOT-1 Experiment, 2018). Credit: Dr. Mohammad Kassemi, Case Western Reserve University

The ZBOT-NC Experiment: Non-Condensable Gas Effects

Non-condensable gases (NCGs) are used as pressurants to extract liquid for engine operations and tank-to-tank transfer. The second experiment, ZBOT-NC will investigate the effect of NCGs on the sealed tank self-pressurization and on pressure control by axial jet mixing. Two inert gases with quite different molecular sizes, Xenon, and Neon, will be used as the non-condensable pressurants. To achieve pressure control or reduction, vapor molecules must reach the liquid-vapor interface that is being cooled by the mixing jet and then cross the interface to the liquid side to condense.

This study will focus on how in microgravity the non-condensable gases can slow down or resist the transport of vapor molecules to the liquid-vapor interface (transport resistance) and will clarify to what extent they may form a barrier at the interface and impede the passage of the vapor molecules across the interface to the liquid side (kinetic resistance). By affecting the interface conditions, the NCGs can also change the flow and thermal structures in the liquid.

ZBOT-NC will use both local temperature sensor data and uniquely developed Quantum Dot Thermometry (QDT) diagnostics to collect nonintrusive whole-field temperature measurements to assess the effect of the non-condensable gases during both self-pressurization heating and jet mixing/cooling of the tank under weightlessness conditions. This experiment is scheduled to fly to the International Space Station in early 2025, and more than 300 different microgravity tests are planned. Results from these tests will also enable the ZBOT CFD model to be further developed and validated to include the non-condensable gas effects with physical and numerical fidelity.

The ZBOT-DP Experiment: Droplet Phase Change Effects

ZBO active pressure control can also be accomplished via injection of subcooled liquid droplets through an axial spray-bar directly into the ullage or vapor volume. This mechanism is very promising, but its performance has not yet been tested in microgravity. Evaporation of droplets consumes heat that is supplied by the hot vapor surrounding the droplets and produces vapor that is at a much lower saturation temperature. As a result, both the temperature and the pressure of the ullage vapor volume are reduced. Droplet injection can also be used to cool down the hot walls of an empty propellant tank before a tank-to-tank transfer or filling operation. Furthermore, droplets can be created during the propellant sloshing caused by acceleration of the spacecraft, and these droplets then undergo phase change and heat transfer. This heat transfer can cause a pressure collapse that may lead to cavitation or a massive liquid-to-vapor phase change. The behavior of droplet populations in microgravity will be drastically different compared to that on Earth.

The ZBOT-DP experiment will investigate the disintegration, coalescence (droplets merging together), phase change, and transport and trajectory characteristics of droplet populations and their effects on the tank pressure in microgravity. Particular attention will also be devoted to the interaction of the droplets with a heated tank wall, which can lead to flash evaporation subject to complications caused by the Liedenfrost effect (when liquid droplets propel away from a heated surface and thus cannot cool the tank wall). These complicated phenomena have not been scientifically examined in microgravity and must be resolved to assess the feasibility and performance of droplet injection as a pressure and temperature control mechanism in microgravity.

Back to Planet Earth

This NASA-sponsored fundamental research is now helping commercial providers of future landing systems for human explorers. Blue Origin and Lockheed Martin, participants in NASA’s Human Landing Systems program, are using data from the ZBOT experiments to inform future spacecraft designs.

Cryogenic fluid management and use of hydrogen as a fuel are not limited to space applications. Clean green energy provided by hydrogen may one day fuel airplanes, ships, and trucks on Earth, yielding enormous climate and economic benefits. By forming the scientific foundation of ZBO cryogenic fluid management for space exploration, the ZBOT science experiments and CFD model development will also help to reap the benefits of hydrogen as a fuel here on Earth.

Project Lead

Dr. Mohammad Kassemi (Dept Mechanical & Aerospace Engineering, Case Western Reserve University)

Sponsoring Organization

Biological and Physical Sciences (BPS) Division, NASA Science Mission Directorate (SMD)

Read the full story here.
Photos courtesy of

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Hampshire accused of ‘sportswashing’ over T20 event despite green claims

Team plan to take part in Global Super League in GuyanaCampaigners call for tour to ditch sponsor ExxonMobilHampshire have been accused of taking part in a “sportswashing vehicle” before their participation in this month’s Global Super League in Guyana, a T20 tournament sponsored by oil giant ExxonMobil.Hampshire’s participation in the GSL comes despite their venue’s public commitment to playing a leading global role in environmental sustainability. The Utilita Bowl celebrated switching on more than 1,000 solar panels before a T20 between England and Australia in September. David Mann, chief executive of the Utilita Bowl, used the initiative to highlight “our commitment to being the greenest international cricket venue”. Continue reading...

Hampshire have been accused of taking part in a “sportswashing vehicle” before their participation in this month’s Global Super League in Guyana, a T20 tournament sponsored by oil giant ExxonMobil.Hampshire’s participation in the GSL comes despite their venue’s public commitment to playing a leading global role in environmental sustainability. The Utilita Bowl celebrated switching on more than 1,000 solar panels before a T20 between England and Australia in September. David Mann, chief executive of the Utilita Bowl, used the initiative to highlight “our commitment to being the greenest international cricket venue”.The new five-team GSL tournament runs from 26 November to 6 December and, alongside Australian state team Victoria, features franchise sides Guyana Amazon Warriors, Lahore Qalandars and Rangpur Riders.ExxonMobil Guyana is its title sponsor, with the tournament website stating the event “has the full support of the Government of Guyana … the government sees the GSL as a key driver for tourism and economic growth”. ExxonMobil found oil in the country in 2015 and, this month, celebrated the production of 500m barrels from the Stabroek block.Etienne Stott, an Olympic gold medallist in 2012 who now campaigns for Extinction Rebellion, told the Guardian: “I’m really sad and angry that yet another sport is being corrupted by the oily money of the fossil fuel industry.”Stott said it was “perverse” for ExxonMobil to sponsor “a supposedly global cricket tournament in a country which is very much at risk from the effects of global heating.“I cannot understand why Hampshire [County] Cricket Club would risk reputational damage by associating itself with such an obvious sportswashing vehicle, especially given their public commitments to be more sustainable,” said Stott. “I hope cricket fans will demand that this tournament ditches its filthy sponsor.”Hampshire have declined to comment.Joe Cooke, an environmental campaigner and ex-professional cricketer for Glamorgan, said: “It’s disheartening to see cricket being sponsored and influenced by companies with such a direct link to the climate crisis. As a sport we are deeply at mercy to the environment with extreme weather events that have been made more likely by a changing climate, impacting the game at all levels. Cricket could be in a unique position to set a positive example by distancing itself from these kinds of partnerships.”ExxonMobil also sponsors the Amazon Warriors, who play in the Caribbean Premier League, and its involvement in cricket highlights the significant relationship between fossil fuel firms and the sport. In May the International Cricket Council announced a four-year extension to its partnership with Aramco, the Saudi Arabian oil company.skip past newsletter promotionSubscribe to our cricket newsletter for our writers' thoughts on the biggest stories and a review of the week’s actionPrivacy Notice: Newsletters may contain info about charities, online ads, and content funded by outside parties. For more information see our Privacy Policy. We use Google reCaptcha to protect our website and the Google Privacy Policy and Terms of Service apply.after newsletter promotionChris Britt-Searle of The Next Test, a group aiming to raise awareness of the climate crisis’s impact on cricket, said: “It’s very easy to condemn individual teams, countries and competitions. But the truth is, the whole of cricket is awash with fossil fuel money.”Britt-Searle added that the tournament could be an “opportunity” for cricketers to discuss the involvement of fossil fuels in cricket, noting the recent letter signed by more than 100 female professional footballers urging Fifa to end its partnership with Aramco.“I would say to all cricketers, all cricket fans, clubs, cricket organisations, you have an opportunity to talk about this,” said Britt-Searle. “There’s a great opportunity here to put your hand up and say, look, we’re not OK with this.”

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Starmer condemns Badenoch for abandoning cross-party consensus on climate crisis policy – UK politics live

Prime minister says Tory leader’s attacks on climate targets diminishes government ability to tackle central issueJohn Prescott: share your tributes and memoriesBritish prime minister Keir Starmer says he is “deeply saddened” to hear that Prescott has died, and called him a “true giant of Labour”.In a statement on X, he said, “I am deeply saddened to hear of the death of John Prescott. John was a true giant of the Labour movement. On behalf of the Labour Party, I send my condolences to Pauline and his family, to the city of Hull, and to all those who knew and loved him. May he rest in peace.”He possessed an inherent ability to connect with people about the issues that mattered to them – a talent that others spend years studying and cultivating, but that was second nature to him.He fought like hell to negotiate the Kyoto Protocol and was an unwavering champion of climate action for decades to come. I’m forever grateful to John for that commitment to solving the climate crisis and will miss him as a dear friend.” Continue reading...

Matt Hancock gives evidence to Covid inquiryWe will carry on reporting tributes to John Prescott as the day goes on, but there is other news happening today too and soon I will switch to the Covid inquiry, where Matt Hancock, the former health secretary, is giving evidence from 10am. He has already given evidence to the inquiry before, but the inquiry is now on module 3, focusing in particular on the impact of the pandemic on the NHS, and Hancock will be talking about that.We have also got John Healey, the defence secretary, giving evidence to the Commons defence committee from 10.30am this morning.Matt Hancock arriving at the Covid inquiry this morning. Photograph: Tayfun Salcı/ZUMA Press Wire/REX/ShutterstockShareUpdated at 04.49 ESTKey eventsShow key events onlyPlease turn on JavaScript to use this featureWe are inviting readers to share their memories of John Prescott. You can do so via this page.Matt Hancock gives evidence to Covid inquiryWe will carry on reporting tributes to John Prescott as the day goes on, but there is other news happening today too and soon I will switch to the Covid inquiry, where Matt Hancock, the former health secretary, is giving evidence from 10am. He has already given evidence to the inquiry before, but the inquiry is now on module 3, focusing in particular on the impact of the pandemic on the NHS, and Hancock will be talking about that.We have also got John Healey, the defence secretary, giving evidence to the Commons defence committee from 10.30am this morning.Matt Hancock arriving at the Covid inquiry this morning. Photograph: Tayfun Salcı/ZUMA Press Wire/REX/ShutterstockShareUpdated at 04.49 ESTThere's no paywall hereApologies for the brief interruption. We hope you’re appreciating these factual, verified, up-to-the-minute news updates provided by our expert reporters.You won't find a paywall around our live blogs – or any of our news, because the Guardian believes that access to trustworthy information is vital for democracy.In a time of increasing misinformation spread by bad actors, extremist media and autocratic politicians, real, reliable journalism has never been more important – and we’re proud to be able to make ours free thanks to the generous support of readers like you. By helping fund the Guardian today, you can play a vital role in combating the bad faith and self-interest of a powerful few who spread lies to undermine our democracy, enrich themselves, and stoke division between Americans.Before you get back to reading the news, we would be grateful if you could take half a minute to give us your support. Any amount helps. Thank you.Peter Mandelson says Prescott was 'the cement that kept New Labour together'Peter Mandelson was one of many people in the Labour party who feuded with John Prescott at various times when they were in government, and at one memorable photocall in the summer of 1997 Prescott compared him to a crab. Today, speaking on Sky News, Mandelson played down the extend of their disagreements, and pointed out that Prescott had supported his application to become Labour’s communications director in 1985 – the job that turned out to be the launchpad for Mandelson’s career.Mandelson said it was wrong to say Prescott was not New Labour. Some people say sometimes that he wasn’t New Labour. But that’s not true. He was New Labour. He was one very essential part of New Labour. He basically kept us anchored in our working class roots, our trade union history. And he was the bridge, essentially, between that and the modernisers in the Labour party, Tony, Gordon, me and the others. And he always wanted that project to work. It’s not as if he was standing outside it and peering in. He was on the inside and making it work. He was, in many respects, the cement that kept New Labour together. Asked what he was like to work with, Mandelson replied: He was absolutely impossible. When I say he was sort of courageous, he was. When I say he was loyal, he was. When I say he was determined, he was. He was always determined to get his own way on any particular issue at any given moment. Right up until the point he’d say, ‘OK, I’ll do this for you. You do this for me. As long as you cover this off I’ll happily go along with it.’ So he was a negotiator. He was a trade union negotiator. He was a broker. But at the end of the day he wanted it to work and the way in which he made it work was by being incredibly difficult for days on end and then finally sealing it, making work, agreeing it and off we went. Mandelson also recalled a surprise conversation earlier this year he had with Prescott. I was at home on a Sunday morning and the phone went and then suddenly I put it on and it was the face of John Prescott on my phone FaceTiming me from Hull. I mean, no advanced warning. No how do you do. It was, ‘Hello, is that you?’ ‘Yes John it is me. What do you want?’ He said ‘I just want to say that I know it was difficult and we were bloody awful to you at times and I was, but actually you did good and I want to forgive you.’ What am I being forgiven for here? It was just, ‘I want to forgive you because you did good. And I know it wasn’t easy at times and I know it was rough and I know I didn’t help but now I understand.’ And I said, ‘John that’s very kind of you. How do you suddenly understand this?’ He said, ‘Oh well somebody gave me this book of yours. I didn’t read it before. It looked very boring. But I’ve looked at it, I’ve dipped into it and I’ve seen what you went through … I feel rather sorry for you actually. And anyway, thanks very much.’ It was a few minutes more … but that was it. That was the last time I spoke to him. Here are more tributes to John Prescott from Labour figures on social media.From Alastair Campbell, Tony Blair’s communications director in No 10 JP RIP … there was nobody else like him. Tony could not have had a better deputy. Labour could not have had a better campaigner. The government could not have had a better negotiator and - yes, often, peacemaker. Hull could not have had a better MP. Of course he was combative but he had an enormous heart and a great capacity for friendship. Even with his horrible illness in later years, the old JP was always there. Love to Pauline, Jonathan and David and nothing but fond memories of a total one off who will be missed by so many. From Yvette Cooper, the home secretary Such sad news about John Prescott. A campaigning Labour hero & a remarkable minister who transformed lives - upgrading millions of council homes, coalfield regeneration, tackling climate change. Fierce & warm hearted - there was no one like him. Thinking of Pauline & family today From Ed Balls, the former adviser to Gordon Brown and later secretary of state for childrenFrom Jeremy Corbyn, the former Labour leader I am really sad to hear that John Prescott has passed away. John was a huge figure and personality, from his seafaring union days to the highest offices in Government. I will be forever grateful for his personal and political support in the 2017 and 2019 elections. His endless warmth and iconic wit were loved on the campaign trail. My deepest sympathies to John’s family at their loss. He will be greatly missed. From Hilary Benn, the Northern Ireland secretary 1/2 John Prescott was a political giant who made a unique contribution to the Labour and trade union movement he loved so deeply. Authentic, funny, tough, highly skilled and, at times, unpredictable, he often used the phrase “traditional Labour values in a modern setting”. 2/2 In doing so, he would reassure and inspire Party members with whom he had a great bond. He will be much missed. All our thoughts are with Pauline and his family on this very sad day. From David Lammy, foreign secretary John Prescott was one of the giants of our party. Committed, loyal, Labour to his core. A relentless champion of working people who never forgot who he came into politics to fight for. Full of good humour and blunt common sense. Rest in peace Angela Rayner pays tribute to Prescott, saying he was 'inspiration to me'Angela Rayner is often compared to John Prescott. They were both brought up working class, became Labour MPs after working in the trade union movement and have been frequently patronised or demonised by Tories and the media, partly on the grounds of class snobbery. And both ended up deputy PM.Here is her tribute to Prescott. Through his half a century of public service and a decade as deputy prime minister, John Prescott was driven by his Labour values to serve working people. Fiercely proud of his working class and trade union roots, he never lost sight of who he came into politics to serve. He used the chance he was given to change the lives of millions of working people. A giant of the labour movement and loyal friend, he will be remembered with huge fondness by all those who knew him. John was not only a Labour legend but an inspiration to me, and always so generous with his time and support. We will miss him greatly. Our thoughts and prayers are with Pauline, David, Johnathan and the rest of the family. ShareUpdated at 04.06 ESTPrescott's family ask people not to send flowers but to donate to Alzheimer's Research UK insteadHere is the full statement from John Prescott’s family announcing his death. Prescott was living with Alzheimer’s in his final years and his family have asked wellwishers minded to send flowers to donate to Alzheimer’s Research UK instead.They say: We are deeply saddened to inform you that our beloved husband, father and grandfather, John Prescott, passed away peacefully yesterday at the age of 86. He did so surrounded by the love of his family and the jazz music of Marian Montgomery. John spent his life trying to improve the lives of others, fighting for social justice and protecting the environment, doing so from his time as a waiter on the cruise liners to becoming Britain’s longest serving deputy prime minister. John dearly loved his home of Hull and representing its people in parliament for 40 years was his greatest honour. We would like to thank the amazing NHS doctors and nurses who cared for him after his stroke in 2019 and the dedicated staff at the care home where he passed away after latterly living with Alzheimer’s. In lieu of flowers and if you wish to do so, you can donate to Alzheimer’s Research UK. As you can imagine, our family needs to process our grief so we respectfully request time and space to mourn in private. Thank you. Here is a John Prescott picture gallery.Gordon Brown pays tribute to PrescottGood morning. I’m Andrew Sparrow, taking over from Caroline Davies.The former prime minister Gordon Brown has just been on the Today programme paying tribute to John Prescott. He said: John was a friend of mine, he was a colleague, but when you think of him, he was a colossus, he was a titan of the Labour movement. John Lennon talked about working class hero. It’s difficult to fit that term, but I think John would like that. You’ve got to look at his achievements. He was probably the first government minister to see the importance of the environment. Kyoto, that environmental treaty in 1997, you’ve got to attribute that to John’s hard work with Al Gore. Then he saw the importance, and he was a pioneer of regional policy. So the fact we have devolution and mayors owes a great deal to what John was thinking right throughout the 1980s and 90s when I was working with him. And then we mustn’t forget that one of the great achievements of John as environment secretary was the repair and improvement of housing, 1.5m houses which would not have been repaired without John’s determination that the social housing stock had to be remodernised. So you’ve got to look at the practical achievements of someone who possibly surprised himself by the way that he managed to become deputy prime minister, but actually made a huge difference. Yorkshire has “lost one of its great political heavyweights,” said Tracy Brabin, mayor for West Yorkshire. In a post on X she said: Deeply sad news to hear of John Prescott’s passing. Yorkshire has lost one of its great political heavyweights. A true Northerner with unwavering authenticity. John’s record speaks for itself: tackling regional inequalities, fighting for social justice and protecting the environment. We must all now build on his legacy and work tirelessly, as he did, to create a country that works for all. ShareUpdated at 03.44 ESTLord Prescott’s wife and two sons said he had been in a care home recently living with Alzheimer’s. Hilary Evans-Newton, chief executive at Alzheimer’s Research UK, said: It’s heartbreaking to hear that former deputy prime minister, Lord John Prescott, one of the most prominent political figures of our generation, has died with Alzheimer’s. Our thoughts are with his family and loved ones during this difficult time. It’s tragic how many lives are being lost to dementia, the leading cause of death in the UK. We’re incredibly moved by Lord Prescott’s family, who have asked for donations to Alzheimer’s Research UK, in lieu of flowers. As the UK’s leading dementia research charity, we’re accelerating progress towards a cure, so no one’s life has to end this way.

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The climate crisis is a big problem. Marine biologist Ayana Elizabeth Johnson is dreaming of even bigger solutions.

Here’s an exercise for you: Imagine the trajectory of our current climate crisis.  You probably don’t need to imagine very hard what this future looks like because we’re seeing it play out in the present: towns torn apart by massive hurricanes, thousands displaced by wildfires, lives taken by extreme heat. All of it is enough […]

Here’s an exercise for you: Imagine the trajectory of our current climate crisis.  You probably don’t need to imagine very hard what this future looks like because we’re seeing it play out in the present: towns torn apart by massive hurricanes, thousands displaced by wildfires, lives taken by extreme heat. All of it is enough to make a person freeze with fear. But there is a flip side to this terror.  Such an all-consuming problem inherently requires innovative solutions and adaptations of epic proportions. So here’s another exercise: Close your eyes and think, what could a world that hasn’t just taken the climate crisis seriously but also risen to the challenge look like? Envisioning a better future in the face of serious climate threats might seem like lofty daydreaming, especially when we take into consideration our world leaders’ inaction. But Ayana Elizabeth Johnson, a marine biologist and climate policy wonk, has spent much of her career dreaming and coming up with climate solutions — and she knows that nihilism and avoidance won’t get us anywhere. In her recently published book, What If We Get It Right?: Visions of Climate Futures, Johnson tackles how we can transform our ways of being, thinking, and doing to stop the worst of climate change. She expertly intertwines her conversations with scientists, artists, and activists to create a practical and accessible guidebook for a more just future brimming with possibilities — a salve for even the most environmentally anxious.  “Peril and possibility coexist,” she writes in the book. Of course, she’s well aware of just how big of an environmental mess our world is in, but you won’t catch her dwelling on the worst-case scenarios for long. “We’re pretty fucked,” Johnson said in her September interview on Vox’s The Gray Area, “but there’s a lot we could do to have a better possible future.”  Johnson is particularly adept at speaking to those who know the climate crisis is real but have the instinct to bury their head in the sand at the thought of such a massive existential crisis. Though she is frank about the state of our world’s environmental health, she speaks and writes with an energizing clarity — whether it’s conversing with climate advocates for her book tour or breaking down big environmental questions as a co-host of the podcast How to Save a Planet. It’s Johnson’s understanding of our instinct to flee the climate problems that has made it essential for her to explore the possibilities to address it and take action that goes beyond protesting or voting. These are important measures, Johnson believes, but also broad ones that aren’t necessarily fine-tuned to our individual experiences, skills, and interests.  For Johnson, a Brooklyn native who calls the ocean her love before it became her career, that looked like co-founding Urban Ocean Lab (UOL) in 2018. The nonprofit think tank specializes in researching coastal cities in the United States — places that one in five Americans call home and are often vulnerable to some of the worst environmental disasters — and developing equitable, pragmatic policy recommendations for these regions.  One such recommendation is UOL’s climate readiness framework for coastal cities. It’s a comprehensive collection of over 70 actions that coastal communities can apply to better adapt to current and future climate risks, such as working with community-based organizations to strengthen disaster preparedness plans and developing home relocation programs for low-income residents and people of color living in climate-vulnerable places.  The Caribbean region in particular has a special place in Johnson’s heart — her late father hailed from Jamaica, whose waters have suffered from pollution and overfishing. “To me, ocean conservation is in part about cultural preservation,” she writes after reflecting on her father’s life between Jamaica and New York City. “We are losing something more fundamental than a meal: a way of life.” It makes sense that Johnson has also worked to improve the waters surrounding these islands. Prior to founding UOL, she led an ocean management policy project called the Blue Halo Initiative at the Waitt Institute, where she served as executive director. Starting in Barbuda in 2013, Johnson focused on engaging with the community, interviewing hundreds of fishers and residents to develop policy recommendations for better preserving the waters and the species within it. Just a year later, the Barbuda Council signed into law a set of ocean zoning policies to protect underwater ecosystems and ensure sustainable fishing. These efforts were soon replicated in Montserrat and Curaçao. Johnson’s reverence for the ocean and the career she’s made out of it has made its way into the American political sphere, too. Back in 2019, the Green New Deal, a set of proposed progressive climate policies, was supported by left-leaning candidates up and down the ballot. Johnson had just one issue with it: It left out our seas almost entirely. “I was feeling bummed about the ocean getting short shrift in the Green New Deal Resolution — just a single, vague reference to the ocean,” Johnson wrote in What If We Get It Right? That summer, Johnson co-authored an op-ed in Grist about this big blue gap and what solutions to fill it with. Within that year, Johnson was contacted by Sen. Elizabeth Warren’s 2020 presidential campaign to help write what would become the Blue New Deal, an official policy platform for the Warren campaign. It was an extensive list of actions, like expanding marine protected areas, building climate-smart ports, and holding Big Agriculture accountable for water pollution. When Johnson later met Sen. Warren, she wrote in What If We Get It Right? that “[Senator Warren] told me it was the plan that got the most excited mentions in her selfie lines.” And while Joe Biden won the Democratic nomination and the election, his administration became the first to put out a federal Ocean Climate Action plan — which included similar elements to the Blue New Deal — after dozens of businesses and organizations (including UOL) pushed the White House to do so. There are a lot of studies that show engaging with nature helps our physical and mental well-being, so it’s not surprising that conserving our environment is important for many people. One word that Johnson often uses and embodies is “biophilia”: a love for nature and life, and in her words, “a powerful driving force for conservation.” With this in mind, I have one more exercise for you: Think of moments you’ve felt biophilia. Maybe you once walked through a lush forest, swam in a pristine lake, or witnessed snow-capped mountains up close. Perhaps you’ve encountered one of the millions of amazing creatures that inhabit these ecosystems. But how can one hold onto this sense of biophilia if much of our ways of life are destroying the very essence of it?  It’s all the more reason not to let our worries immobilize us and instead try to get it right, just as Johnson has done. Her wide-ranging expertise on climate policy; deeply empathetic and inclusive lens for climate solutions; and her unwavering, contagious biophilia has made her a bold visionary to follow in the climate space.  How apt that a lover of the ocean is making waves. —Sam Delgado

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