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3 Questions: Exploring the limits of carbon sequestration

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Thursday, February 20, 2025

As part of a multi-pronged approach toward curbing the effects of greenhouse gas emissions, scientists seek to better understand the impact of rising carbon dioxide (CO2) levels on terrestrial ecosystems, particularly tropical forests. To that end, climate scientist César Terrer, the Class of 1958 Career Development Assistant Professor of Civil and Environmental Engineering (CEE) at MIT, and colleague Josh Fisher of Chapman University are bringing their scientific minds to bear on a unique setting — an active volcano in Costa Rica — as a way to study carbon dioxide emissions and their influence. Elevated CO2 levels can lead to a phenomenon known as the CO2 fertilization effect, where plants grow more and absorb greater amounts of carbon, providing a cooling effect. While this effect has the potential to be a natural climate change mitigator, the extent of how much carbon plants can continue to absorb remains uncertain. There are growing concerns from scientists that plants may eventually reach a saturation point, losing their ability to offset increasing atmospheric CO2. Understanding these dynamics is crucial for accurate climate predictions and developing strategies to manage carbon sequestration. Here, Terrer discusses his innovative approach, his motivations for joining the project, and the importance of advancing this research.Q: Why did you get involved in this line of research, and what makes it unique?A: Josh Fisher, a climate scientist and long-time collaborator, had the brilliant idea to take advantage of naturally high CO2 levels near active volcanoes to study the fertilization effect in real-world conditions. Conducting such research in dense tropical forests like the Amazon — where the largest uncertainties about CO2 fertilization exist — is challenging. It would require large-scale CO2 tanks and extensive infrastructure to evenly distribute the gas throughout the towering trees and intricate canopy layers — a task that is not only logistically complex, but also highly costly. Our approach allows us to circumvent those obstacles and gather critical data in a way that hasn't been done before.Josh was looking for an expert in the field of carbon ecology to co-lead and advance this research with him. My expertise of understanding the dynamics that regulate carbon storage in terrestrial ecosystems within the context of climate change made for a natural fit to co-lead and advance this research with him. This field has been central to my research, and was the focus of my PhD thesis.Our experiments inside the Rincon de la Vieja National Park are particularly exciting because CO2 concentrations in the areas near the volcano are four times higher than the global average. This gives us a rare opportunity to observe how elevated CO2 affects plant biomass in a natural setting — something that has never been attempted at this scale.Q: How are you measuring CO2 concentrations at the volcano?A: We have installed a network of 50 sensors in the forest canopy surrounding the volcano. These sensors continuously monitor CO2 levels, allowing us to compare areas with naturally high CO2 emissions from the volcano to control areas with typical atmospheric CO2 concentrations. The sensors are Bluetooth-enabled, requiring us to be in close proximity to retrieve the data. They will remain in place for a full year, capturing a continuous dataset on CO2 fluctuations. Our next data collection trip is scheduled for March, with another planned a year after the initial deployment.Q: What are the long-term goals of this research?A: Our primary objective is to determine whether the CO2 fertilization effect can be sustained, or if plants will eventually reach a saturation point, limiting their ability to absorb additional carbon. Understanding this threshold is crucial for improving climate models and carbon mitigation strategies.To expand the scope of our measurements, we are exploring the use of airborne technologies — such as drones or airplane-mounted sensors — to assess carbon storage across larger areas. This would provide a more comprehensive view of carbon sequestration potential in tropical ecosystems. Ultimately, this research could offer critical insights into the future role of forests in mitigating climate change, helping scientists and policymakers develop more accurate carbon budgets and climate projections. If successful, our approach could pave the way for similar studies in other ecosystems, deepening our understanding of how nature responds to rising CO2 levels.

Assistant Professor César Terrer discusses pioneering volcano research to track carbon dynamics in tropical forests.

As part of a multi-pronged approach toward curbing the effects of greenhouse gas emissions, scientists seek to better understand the impact of rising carbon dioxide (CO2) levels on terrestrial ecosystems, particularly tropical forests. To that end, climate scientist César Terrer, the Class of 1958 Career Development Assistant Professor of Civil and Environmental Engineering (CEE) at MIT, and colleague Josh Fisher of Chapman University are bringing their scientific minds to bear on a unique setting — an active volcano in Costa Rica — as a way to study carbon dioxide emissions and their influence. 

Elevated CO2 levels can lead to a phenomenon known as the CO2 fertilization effect, where plants grow more and absorb greater amounts of carbon, providing a cooling effect. While this effect has the potential to be a natural climate change mitigator, the extent of how much carbon plants can continue to absorb remains uncertain. There are growing concerns from scientists that plants may eventually reach a saturation point, losing their ability to offset increasing atmospheric CO2. Understanding these dynamics is crucial for accurate climate predictions and developing strategies to manage carbon sequestration. Here, Terrer discusses his innovative approach, his motivations for joining the project, and the importance of advancing this research.

Q: Why did you get involved in this line of research, and what makes it unique?

A: Josh Fisher, a climate scientist and long-time collaborator, had the brilliant idea to take advantage of naturally high CO2 levels near active volcanoes to study the fertilization effect in real-world conditions. Conducting such research in dense tropical forests like the Amazon — where the largest uncertainties about CO2 fertilization exist — is challenging. It would require large-scale CO2 tanks and extensive infrastructure to evenly distribute the gas throughout the towering trees and intricate canopy layers — a task that is not only logistically complex, but also highly costly. Our approach allows us to circumvent those obstacles and gather critical data in a way that hasn't been done before.

Josh was looking for an expert in the field of carbon ecology to co-lead and advance this research with him. My expertise of understanding the dynamics that regulate carbon storage in terrestrial ecosystems within the context of climate change made for a natural fit to co-lead and advance this research with him. This field has been central to my research, and was the focus of my PhD thesis.

Our experiments inside the Rincon de la Vieja National Park are particularly exciting because CO2 concentrations in the areas near the volcano are four times higher than the global average. This gives us a rare opportunity to observe how elevated CO2 affects plant biomass in a natural setting — something that has never been attempted at this scale.

Q: How are you measuring CO2 concentrations at the volcano?

A: We have installed a network of 50 sensors in the forest canopy surrounding the volcano. These sensors continuously monitor CO2 levels, allowing us to compare areas with naturally high CO2 emissions from the volcano to control areas with typical atmospheric CO2 concentrations. The sensors are Bluetooth-enabled, requiring us to be in close proximity to retrieve the data. They will remain in place for a full year, capturing a continuous dataset on CO2 fluctuations. Our next data collection trip is scheduled for March, with another planned a year after the initial deployment.

Q: What are the long-term goals of this research?

A: Our primary objective is to determine whether the CO2 fertilization effect can be sustained, or if plants will eventually reach a saturation point, limiting their ability to absorb additional carbon. Understanding this threshold is crucial for improving climate models and carbon mitigation strategies.

To expand the scope of our measurements, we are exploring the use of airborne technologies — such as drones or airplane-mounted sensors — to assess carbon storage across larger areas. This would provide a more comprehensive view of carbon sequestration potential in tropical ecosystems. Ultimately, this research could offer critical insights into the future role of forests in mitigating climate change, helping scientists and policymakers develop more accurate carbon budgets and climate projections. If successful, our approach could pave the way for similar studies in other ecosystems, deepening our understanding of how nature responds to rising CO2 levels.

Read the full story here.
Photos courtesy of

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The Major NJ Wildfire Shows Unexpected Urban Areas Are at Risk

A forest fire that erupted in New Jersey and spread overnight highlights the major wildfire risk faced by the state and other urban areas

Why New Jersey Is Actually a Place with Major Wildfire RiskA forest fire that erupted in New Jersey and spread overnight highlights the major wildfire risk faced by the state and other urban areasBy Stephanie Pappas edited by Jeanna BrynerFirefighters try to extinguish a fast-moving brush fire along on November 19, 2024 in New York City. Spencer Platt/Getty ImagesA forest fire that erupted in New Jersey yesterday morning was spurred by winds and dry weather, fulfilling a prediction by state officials that the state would see an active fire season this spring.The Jones Road Fire has burned 12,000 acres, more than the average area burned by wildfires in the state in an entire year. A drought warning has been in effect in New Jersey since November 2024, which means that many drought status indicators, such as current drinking water supplies, are below normal. And after a busy fall fire season, spring kicked off with an above-average number of fires as well. The Jones Road Fire, which forced evacuations in Ocean County, New Jersey, threatened hundreds of homes and businesses in a populated area.How Did the New Jersey Fire Spread?On supporting science journalismIf you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today.State fire officials have not yet determined the cause of the fire, but it grew in dry, windy conditions. The blaze started at the edge of the Pinelands, a region of pine forests known for its wildfire risk. In fact, the Pinelands’ landscape has been shaped by fire—if it didn’t regularly burn, the ecosystem would transition into an oak forest, says David Robinson, New Jersey’s state climatologist and a professor at Rutgers University.“Traditionally, spring is fire season down in the Pinelands, so as far as seasonal timing to this fire, there’s nothing unusual,” Robinson says. “The fact that [the fire] spread so quickly may be a testament to the fact that it hasn’t rained in over 10 days.”Because of New Jersey’s population density, the state experiences a lot of what research ecologist Michael Gallagher of the U.S. Department of Agriculture Forest Service Northern Research Station calls “interface fires,” which are fires that start where human habitation bumps up against wildland. “Fires as small as an acre frequently threaten homes,” Gallagher says.But the Jones Road fire moved quickly into an exurb-type environment with numerous buildings in its path. Wind-borne embers sped the fire along, starting spot fires that ignited new blazes, Gallagher says. His research has shown that in the spring, the sun tends to heat the south side of pine trees in the forests of the Pinelands, causing the bark to dry and curl. These curls ignite easily in a fire. Winds blowing from the north are then well poised to catch these tiny flaming brands, blowing them ahead of the main fire.How Did New Jersey’s Drought Worsen Fire Conditions?October 2024 was the driest month in the state in 130 years, Robinson says. Though fires generally peak in spring in New Jersey, it saw a busy fire season in the fall, as did much of the Northeast.Winter brought some relief. This year, however, New Jersey’s fire season, which typically starts in March, began in earnest in January, state officials said in a March 3 news conference. Between January 1 and March 3, the state saw 214 fires burn through 514 acres, the New Jersey Department of Environmental Protection reported. In comparison, 69 fires burned 21 acres during the same period in 2024.“We’re continuing just where we left off last year,” said state fire chief Bill Donnelly in the briefing.Precipitation improved somewhat in March and April, Robinson says, but it hasn’t recovered to the point that the state is out of the drought. “The news is all kind of good, but we still have to remember we are in a drought warning,” he says. And while the overall trend has been toward more moisture, the Pinelands area had been going through a mini dry spell before the fire began, with almost two weeks without rain, he says. The sandy soil and pine needles in the regions don’t hold on to water for long.“This area dries out very quickly,” Robinson says.That means the weather was ripe for fire, and wind gusts of up to 25 miles per hour quickly whipped the fire toward inhabited areas.“Last night [the fire] was on the eastern end of the Pinelands, near the [Garden State] Parkway, and it hopped the Parkway and headed toward the coast in a populated area. So [this was] a real worrisome situation,” Robinson says.How Will Climate Change Affect New Jersey’s Fire Risk?Wildfires are aggressively managed in New Jersey, with prescribed burns to reduce fuel and quick suppression when fires do ignite, Robinson says. These evolving actions should tamp down any climate-change-related increase in risk and make it difficult to compare the state’s fire outlook with a preindustrial “normal.” New Jersey has a history of large fires, including a multiple-fire outbreak in 1963 known as Black Saturday, which burned 183,000 acres and killed seven people.Long-term projections suggest the state will get a little wetter in a warming world, though rain is not expected to become more frequent, but rather will likely be heavier when it does fall. Warming temperatures could nudge the state’s fire risk a little bit higher as fuels dry out faster, however.“Things become volatile pretty quickly,” Robinson says.

Forests
Agriculture
Climate

A Sequoia Forest in Detroit? Plantings to Improve Air Quality and Mark Earth Day

Arborists are hoping to transform vacant land on Detroit’s eastside by planting giant sequoias, the world’s largest trees

DETROIT (AP) — Arborists are turning vacant land on Detroit's eastside into a small urban forest, not of elms, oaks and red maples indigenous to the city but giant sequoias, the world's largest trees that can live for thousands of years.The project on four lots will not only replace long-standing blight with majestic trees, but could also improve air quality and help preserve the trees that are native to California’s Sierra Nevada, where they are threatened by ever-hotter wildfires.Detroit is the pilot city for the Giant Sequoia Filter Forest. The nonprofit Archangel Ancient Tree Archive is donating dozens of sequoia saplings that will be planted by staff and volunteers from Arboretum Detroit, another nonprofit, to mark Earth Day on April 22.Co-founder David Milarch says Archangel also plans to plant sequoias in Los Angeles, Oakland, California, and London. The massive conifers can grow to more than 300 feet (90 meters) tall with a more than 30-foot (9-meter) circumference at the base. They can live for more than 3,000 years.“Here’s a tree that is bigger than your house when it’s mature, taller than your buildings, and lives longer than you can comprehend,” said Andrew “Birch” Kemp, Arboretum Detroit's executive director.The sequoias will eventually provide a full canopy that protects everything beneath, he said.“It may be sad to call these .5- and 1-acre treescapes forests,” Kemp said. “We are expanding on this and shading our neighborhood in the only way possible, planting lots of trees.”Giant sequoias are resilient against disease and insects, and are usually well-adapted to fire. Thick bark protects their trunks and their canopies tend to be too high for flames to reach. But climate change is making the big trees more vulnerable to wildfires out West, Kemp said.“The fires are getting so hot that its even threatening them,” he said. Descendants of Stagg and Waterfall Archangel, based in Copemish, Michigan, preserves the genetics of old-growth trees for research and reforestation. The sequoia saplings destined for Detroit are clones of two giants known as Stagg — the world's fifth-largest tree — and Waterfall, of the Alder Creek grove, about 150 miles (240 kilometers) north of Los Angeles.In 2010, Archangel began gathering cones and climbers scaled high into the trees to gather new-growth clippings from which they were able to develop and grow saplings.Sequoias need space, and metropolitan Detroit has plenty of it.In the 1950s, 1.8 million people called Detroit home, but the city's population has since shrunk to about one-third of that number. Tens of thousands of homes were left empty and neglected.“There’s not another urban area I know of that has the kind of potential that we do to reforest," he said. “We could all live in shady, fresh air beauty. It's like no reason we can’t be the greenest city in the world.”Within the last decade, 11 sequoias were planted on vacant lots owned by Arboretum Detroit and nine others were planted on private properties around the neighborhood. Each now reaches 12 to 15 feet (3.6 to 4.5 meters) tall. Arboretum Detroit has another 200 in its nursery. Kemp believes the trees will thrive in Detroit.“They’re safer here ... we don’t have wildfires like (California). The soil stays pretty moist, even in the summer,” he said. “They like to have that winter irrigation, so when the snow melts they can get a good drink.” How will the sequoias impact Detroit? Caring for the sequoias will fall to future generations, so Milarch has instigated what he calls “tree school” to teach Detroit’s youth how and why to look after the new trees.“We empower our kids to teach them how to do this and give them the materials and the way to do this themselves,” Milarch said. “They take ownership. They grow them in the classrooms and plant them around the schools. They know we’re in environmental trouble.”Some of them may never have even walked in a forest, Kemp said.“How can we expect children who have never seen a forest to care about deforestation on the other side of the world?" Kemp said. "It is our responsibility to offer them their birthright.”City residents are exposed to extreme air pollution and have high rates of asthma. The Detroit sequoias will grow near a heavily industrial area, a former incinerator and two interstates, he said.Kemp’s nonprofit has already planted about 650 trees — comprising around 80 species — in some 40 lots in the area. But he believes the sequoias will have the greatest impact.“Because these trees grow so fast, so large and they’re evergreen they’ll do amazing work filtering the air here,” Kemp said. “We live in pretty much a pollution hot spot. We’re trying to combat that. We’re trying to breathe clean air. We’re trying to create shade. We’re trying to soak up the stormwater, and I think sequoias — among all the trees we plant — may be the strongest, best candidates for that.”Copyright 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.Photos You Should See - Feb. 2025

Forests
Climate
Pollution

Banned DDT discovered in Canadian trout 70 years after use, research finds

Potential danger to humans and wildlife from harmful pesticide discovered in fish at 10 times safety limitResidues of the insecticide DDT have been found to persist at “alarming rates” in trout even after 70 years, potentially posing a significant danger to humans and wildlife that eat the fish, research has found.Dichlorodiphenyltrichloroethane, known as DDT, was used on forested land in New Brunswick, Canada, from 1952 to 1968. The researchers found traces of it remained in brook trout in some lakes, often at levels 10 times higher than the recommended safety threshold for wildlife. Continue reading...

Residues of the insecticide DDT have been found to persist at “alarming rates” in trout even after 70 years, potentially posing a significant danger to humans and wildlife that eat the fish, research has found.Dichlorodiphenyltrichloroethane, known as DDT, was used on forested land in New Brunswick, Canada, from 1952 to 1968. The researchers found traces of it remained in brook trout in some lakes, often at levels 10 times higher than the recommended safety threshold for wildlife.“DDT is a probable carcinogen that we haven’t used in 70 years here [Canada], yet it’s abundant in fish and lake mud throughout much of the province at shockingly high levels,” said Josh Kurek, an associate professor in environmental change and aquatic biomonitoring at Mount Allison University in Canada and lead author of the research.The research, published in the journal Plos One, discovered that DDT pollution covers about 50% of New Brunswick province. Brook trout is the most common wild fish caught in the region, and the research found DDT was present in its muscle tissue, in some cases 10 times above the recommended Canadian wildlife guidelines.Researchers said DDT, which is classified by health authorities as a“probable carcinogen”, can persist in lake mud for decades after treatment and that many lakes in New Brunswick retain such high levels of legacy DDT that the sediments are a key source of pollution in the food web.“The public, especially vulnerable populations to contaminants such as women of reproductive age and children, need to be aware of exposure risk to legacy DDT through consumption of wild fish,” said Kurek.Throughout the 1950s and 60s, half the province’s conifer forests were sprayed with DDT, a synthetic insecticide used to control insects carrying diseases such as malaria and typhus. Canada banned the use of the substance in the 1980s.The 2001 Stockholm convention on persistent organic pollutants banned DDT worldwide for mass agricultural use, although it is still permitted in small quantities for malaria control.“This mess can’t be cleaned up,” said Kurek. “DDTs can persist in lake mud for decades to centuries and then cycle in the food web. The best approach is to manage the public’s exposure of legacy DDTs by encouraging everyone to follow fish consumption guidelines and consider reducing exposure.skip past newsletter promotionThe planet's most important stories. Get all the week's environment news - the good, the bad and the essentialPrivacy 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 promotion“Our findings are a clear wake-up call to abandon our overreliance on synthetic chemicals. Lessons need to be learned so we don’t repeat past mistakes. Our study hopefully informs on other contaminants that we apply broadly today, such as road salt and herbicides like glyphosate. We absolutely need to do things differently or our ecosystems will continue to face a lifetime of pollution.”

Forests
Chemicals
Health

Rights of Nature Defender Wins Goldman Prize for Precedent-Setting Work Protecting an Imperiled River

Mari Luz Canaquiri Murayari, an Indigenous Kukama leader from the Peruvian Amazon, has been awarded the prestigious Goldman Environmental Prize for her decades-long fight to protect the Marañón River, home to her peoples’ ancestors and a lifesource for rainforest ecosystems that keep the world livable.  The award, announced Monday, recognizes her leadership in advancing the […]

“We do this not only for us, but for all of humanity and all beings.” For Mari Luz Canaquiri Murayari of Peru, a winner of this year’s prestigious Goldman Environmental Prize, everything in nature has a role and must be protected. She’s risked her own safety to do so.By Katie SurmaMari Luz Canaquiri Murayari, an Indigenous Kukama leader from the Peruvian Amazon, has been awarded the prestigious Goldman Environmental Prize for her decades-long fight to protect the Marañón River, home to her peoples’ ancestors and a lifesource for rainforest ecosystems that keep the world livable. 

Forests
Indigenous
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Portland City Council moves to reject controversial PGE Forest Park transmission project

The Portland City Council moved Thursday to reject a PGE transmission upgrade project in Forest Park that would require the utility to clearcut more than 370 trees on about 5 acres in the park.

The Portland City Council moved Thursday to reject a Portland General Electric transmission upgrade project in Forest Park that would require the utility to clearcut more than 370 trees on about 5 acres in the park. The decision Thursday night – described as “tentative” until a final vote on May 7 – came after councilors considered appeals by the Forest Park Conservancy and Forest Park Neighborhood Association to overturn a city of Portland hearings officer approval in March of PGE’s proposal. The vote followed five hours of presentations and public testimony and directs city attorneys to write an ordinance to grant the appeals and overturn the hearings officer’s decision. PGE can appeal to the Oregon Land Use Board of Appeals. PGE wants to rewire a 1970s transmission line and add a second line in the utility’s existing right-of-way and said the upgrade will address an increase in the region’s energy demand and prevent rolling blackouts in North and Northwest Portland. A report from Portland’s Permitting and Development Office in January recommended that the hearings officer turn down PGE’s project due to non-compliance with environmental standards and the city’s Forest Park management plan. But hearings officer Marisha Childs last month went against those recommendations, agreeing with PGE about the need for the project and finding that routing through Forest Park “is the least environmentally detrimental option” of all the alternatives PGE analyzed. The two groups that filed the appeals said PGE failed to meet city approval criteria and that project would set a precedent for further development in the park. PGE’s proposal had touched off a months-long clash between the utility and opponents who seek to protect the trees in the 5,200-acre park because they provide valuable habitat for countless wildlife species and climate benefits to all city residents. More than 3,000 people filed testimony about the project, including over 1,000 who sent in comments ahead of the appeals hearing, with the vast majority against the upgrade. Several hundred protesters gathered at City Hall before the hearing. They held cardboard cutouts of trees, animals and insects and signs that read “Save Forest Park,” “No more ecocide” and “You have to be nuts to destroy Forest Park.” A protester at Portland City Hall holds a sign opposing PGE's transmission upgrade project in Forest Park ahead of a City Council appeals hearing. Beth Nakamura“It’s important to have more energy transmission infrastructure, power lines and responsive grids, yet this is one of the situations where it is very clear there is no ambiguity. PGE can build this project elsewhere in order to keep the lights on,” Damon Motz-Storey, the Sierra Club Oregon chapter’s director, told the crowd. “These trees have been standing since before we even had electricity in homes.”Motz-Storey then led the rally in a chant: “Listen to the people and the trees, not PGE.” Protesters and park advocates filled the council chambers and two overflow rooms, testifying one after another that the PGE project runs counter to the city’s plan to sustain an old-growth forest in Forest Park and asking for the council to save the trees and protect the park. Protesters at Portland City Hall listen as the City Council considers the appeals on PGE's controversial Forest Park transmission project. Beth Nakamura“This project is unacceptable to us and the community and the critters and plants that depend on us to say no to cutting trees, building roads, bulldozing, filling in wetlands and streams and saying this is good for climate resilience,” said Scott Fogarty, executive director with Forest Park Conservancy, the group that filed one of the appeals. The conservancy formed to maintain trails and restore native habitat in the park. Fogarty said PGE’s proposed plan to offset losses from the upgrade does not address cutting down 100-year-old trees and the benefits they bring. The mitigation proposal includes planting Oregon white oak seedlings near the project area, seeding the transmission corridor and access road edges with a pollinator-friendly native seed mix and paying a fee to the city to remove invasive species in the park. He also said the upgrade would pave the way for city approval of future phases of the project in Forest Park and lead to more tree removal. PGE has said those future phases could affect another 15 acres of the park. “Is 5 acres acceptable? Is 20 acres acceptable? Where do we draw the line?” Fogarty asked the council members. “One could argue losing just one 100-year-old tree is unacceptable, let alone 5 acres. In the age of climate resilience, this project flies in the face of retaining carbon suckers in a region that is seeing increased impacts from climate change, including potential fire danger.” PGE argued before the council that the project area is neither old nor ancient forest and that the maintenance of existing transmission lines is key to preserving blackout-free electricity. A proposal by Portland General Electric to cut more than 370 trees in Forest Park to upgrade transmission lines has spurred opposition. The utility and renewable energy proponents say the upgrades are needed to address transmission bottlenecks and fulfill state clean energy mandates.courtesy of Portland General Electric“Alleviating this choke point is important because our experts predict that as early as 2028 there is the risk of outages during times of peak demand,” said Randy Franks, a senior project manager for PGE. “Think about the hottest part of the day, during an ongoing heat wave, with no fans and no air conditioning.”Franks said the more than 20 alternatives PGE examined were not practical, would require the utility to take property through eminent domain, would take too much time or cost too much – and could lead to similar or even greater negative impacts to trees and wildlife outside the park. He said the city’s Forest Park management plan acknowledges the existence of utility corridors and the need to maintain and upgrade them over time and that doing so will help reduce global warming.“If we are serious about combating climate change, we simply have to improve the grid, keep it reliable and increase transmission capacity,” Franks said. Only a handful of people testified in favor of PGE’s plans. “Utilities around the country, including ours, are facing the most rapid load increases in a generation and concomitant reliability challenges. At the same time, our state is laboring to remove from the grid the coal and gas plants that are fueling climate change locally,” said Angus Duncan, the former chair of the Northwest Conservation and Power Planning Council, a group tasked with developing and maintaining a regional power plan. “We need to rebuild the power system to exclude fossil generation.” Council members Angelita Morillo and Steve Novick questioned the assertion that PGE’s proposal would help combat climate change. Novick also asked why PGE did not provide more evidence as to why the transmission upgrades are needed by 2028, not at a later date. Other councilors said they did not feel PGE had proved an alternative outside the park was unfeasible and did not present a compelling mitigation plan. And most of the 12 council members said they disagreed with PGE and the hearings officer that the proposal meets the parameters of the park’s management plan. “Ultimately, I think what has been proposed is probably the best option in the park,” said Councilor Eric Zimmerman. But, he said, nothing in PGE’s proposal showed that the council should overrule the Forest Park management plan. “I don’t think the standard has been met to not follow that plan,” Zimmerman said.Council President Elana Pirtle-Guiney agreed. “If an alternative (to the project) exists, we should not be granting an exception,” she said. Councilor Dan Ryan said the decision will likely be one of many to pit the needs for clean electricity against those of protecting the environment. “Portland will be having more and more tough decisions that include extremely difficult trade-offs. This is just where we are in managing the climate crisis,” Ryan said. “I think PGE worked really hard to find the best option and yet we all want a different option.” That’s because, he added, he – like other Portlanders – loves the park and its trees. “Forest Park is a cathedral,” Ryan said. “And maybe it’s Holy Week and I’m just treating this in a very spiritual way, but it’s just really difficult for me to think I could take a vote that would on the appearance be about deforesting Forest Park during this sacred week.” — Gosia Wozniacka covers environmental justice, climate change, the clean energy transition and other environmental issues. Reach her at gwozniacka@oregonian.com or 971-421-3154.Our journalism needs your support. Subscribe today to OregonLive.com.

Forests
Animals
Conservation

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The Big Green

Jeanne's last cutting tree site has been destroyed by environmental activists. While she tries to save some equipment, she ends up stuck on the first branch of a 30 meters high, centuries-old tree. Her only hope: to climb higher to find some network and call for help.‍

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The Windshield Effect

As a child, Julian and his mother, Sylvie, could spend hours out in nature admiring the soundtrack of the plentiful insects. One day, a grown Julian is out on a run in those same woods and when he takes off his ear buds, realizes he cannot hear anything at all. A trip to the audiologist assures him there is nothing wrong with his ears, but he is still left shaken. Back in the forest, he comes to the realization that the insects themselves have gone silent in a mass die off. Also known as the "Windshield Phenomenon" that documents how bugs no longer splatter on windshields as we drive as insect populations are down more than 45% over the last 4 decades.

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Foresters

Some teenagers kidnap a kid in the forest and take him to their boss in a cottage.

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Where Do They All Go?

Join us on an quiet trip into the woods and see all the sites, big and small, that you may not have noticed before. There are critters, birds, deer, trees, and great bodies of water that will capture your eye for you to gaze upon. But be forewarned, some day these great sites may disappear in place for something more modern. So enjoy what time you have to gaze on such sites, it may be your last.

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El Monte (The Woodland)

In Sierra Maestra, Cuba, José Manuel explains to his granddaughter Malena his world view through deep knowledge of natures' mysteries. Plants and people have great resemblances and must respect each other. José Manuel hopes that Malena inherits the knowledge that he obtained from the father and she becomes a great mountain tree.

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