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How do you define climate adaptation? Here are 10,000 ways.

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Thursday, November 21, 2024

The essence of the Paris climate agreement was distilled into a single number. The almost 200 countries that signed the pact in 2016 agreed they would try to limit global warming to 1.5 degrees Celsius above pre-industrial levels. Over the past decade, as these countries have rolled out renewable energy installations and decommissioned coal plants, we have been able to evaluate their efforts against this number. (The results have not been promising.) But the 1.5-degree target was just one element of the Paris accord. The world also committed to throw its weight behind efforts to adapt to the global warming already baked in by centuries of fossil-fueled industrialization. Even if emissions fall, disasters over the next century will displace many millions of people and destroy billions of dollars in property, particularly in developing countries across Africa, Latin America, and Asia. Those countries fought to ensure that adaptation to those hazards was a key pillar of the agreement. But there’s no one way to measure the success of this commitment. Should the U.N. measure the number of deaths from disasters, or the value of property destroyed in floods, or the incidence of hunger, or the availability of clean water? How will the international community determine the efficacy of adaptation measures like sea walls and drought-resistant crops, given that the disasters they prevent remain so unpredictable? “There is no one single measure you can use that will apply to all adaptation globally,’” said Emilie Beauchamp, an adaptation expert at the International Institute for Sustainable Development, a think tank, who is participating in adaptation talks at COP29, this year’s U.N. climate conference in Baku, Azerbaijan. “It’s not like when we say, ‘we reduce our emissions.’ You can say we need to reduce vulnerability, but that’s going to change according to whose vulnerability you’re talking about.” This question is far from academic: Climate change is fueling more frequent and severe disasters, ravaging places with vulnerable infrastructure. In Zambia, electricity service has been reduced to just a few hours a day thanks to drought emptying out a key reservoir. Meanwhile, a year’s worth of rainfall deluged the Valencia region of Spain in just a few days last month, causing flooding that killed more than 200 people. In the United States, warming helped juice the intensity of several major hurricanes that made landfall this year. Despite the urgency, adaptation hasn’t received much attention at recent U.N. climate talks. This year’s COP is no exception. While the conferences often open with rich countries making major new funding pledges, this year just $60 million in new pledges went to the world’s biggest adaptation fund. That total, raised by European nations and South Korea, is well short of the $300 million the fund had hoped to raise. While the main target of COP29 is a new agreement on a global finance goal — which could end up well over a trillion U.S. dollars and is intended to help the developing world with all aspects of the climate fight — wealthy countries have refused to reserve a portion of that target for adaptation, in part because adaptation efforts attract far less private investment than renewable energy. In finance talks, developing nations have asked that billions of dollars be set aside for adaptation — a far cry from the $60 million announced at the start of the conference. Read Next Can you solve the world’s trillion-dollar climate finance puzzle? Jake Bittle Despite the funding impasse, the world is inching closer to finally defining an effort that could make the difference between life and death for millions of people around the world. The U.N. is halfway through a two-year attempt to finally pick “adaptation indicators,” or global yardsticks that will allow every country to measure its climate resilience. This decade-delayed effort to complete the ambitions of the Paris agreement will in theory give the world a way to measure adaptation success. “We’re hopeful,” said Hawwa Nabaaha Nashid, an official at the environmental ministry of the Maldives, an island state in the Indian Ocean. “If there’s a high-quality [outcome], we can answer the question—how well are we adapting and what needs to be done differently?” There are still big hurdles to clear. The latest text of the adaptation negotiators were considering, which appeared early Thursday, left out some priorities of developing countries, but negotiators expressed more optimism about the adaptation item than they did about other items such as decarbonization and climate finance. And the task of selecting indicators is daunting in itself. Last year’s COP saw agreement on specific target areas for adaptation, including water, health, biodiversity, food, infrastructure, poverty, and heritage. But to measure progress in these target areas, negotiators have proposed a whopping 10,000 potential indicators. This eye-popping sum highlights just how fluid and context-dependent the notion of “ climate adaptation” really is.  Some potential indicators, like “area of contorta pine” (a European Union proposal on biodiversity) and “number of boreholes drilled” (a water proposal from developing countries) seem far too specific, since most of the world doesn’t have significant amounts of contorta pine or get its water by drilling boreholes. Others, such as “types of synergies created” seem so vague as to be almost useless. Some, such as “number of mining operations in protected areas reviewed and temporarily suspended” don’t seem to have anything to do with adapting to climate disasters. “By the very nature of adaptation being more diffuse and broad, you get a multitude of indicators, sub-indicators, and criteria,” said Kalim Shah, a professor of environmental science at the University of Delaware who has assisted small island states like the Marshall Islands with adaptation planning. “It’s much more diffuse, and maybe that’s part of the problem: too many cooks in the kitchen.” The major roadblock in these discussions is money. In every negotiation, poor countries have demanded clear language acknowledging that adaptation is impossible without adequate funding, while rich countries have tried to exclude such language and focus on planning and logistics. In the fight over the indicators, the developing world is seeking a commitment to include an indicator that measures “means of implementation” — in other words, a metric for how capable countries are of carrying out their adaptation plans. This would amount to an acknowledgement that funding and capacity are critical to climate adaptation of any kind, whether it’s building new sand dams for pastoral herders or tracking the spread of dengue fever. But even that acknowledgement appears to be controversial. “It is still a big contention,” said Portia Adade Williams, who is negotiating adaptation needs on behalf of Ghana. “I’m still not sure how we are going to end it. But from a developing country point of view, this would be a complete red line, to have a decision that doesn’t allow us to track [capacity].”  Nashid, of the Maldives, said the country can’t consider scaling up its adaptation efforts without more money. The country has used huge amounts of reclaimed land to build quasi-artificial islands that can house displaced populations from lower-lying isles. “We have to exhaust our limited domestic budget to finance our adaptation efforts, taking away from other priority areas such as healthcare and education,” she told Grist. The capacity issue is especially acute for island nations with small populations, who don’t always have the infrastructure needed to navigate the complex bureaucracy of the multilateral U.N. funds that support adaptation. These low-lying nations often face an almost existential threat from rising sea levels, so they won’t necessarily benefit from just one capital project paid for by these funds — they have to adapt their entire territories in order to survive. “By the time all these little things have happened for you to get the money, the risks have increased,” said Filomena Nelson, an adaptation negotiator from Samoa who works for the Secretariat of the Pacific Regional Environment Programme, an intergovernmental authority that manages environmental protection across Pacific islands. “It takes forever, it’s complicated, it’s a vicious cycle.” When negotiators can’t discuss money, adaptation talks tend to get mired in the realm of the abstract. This was evident in Baku this week, where negotiators in one adaptation talk confronted a multi-dimensional graph about “transformational adaptation” with three axes: “time,” “changes in paradigms,” and “changes in the fundamental attributes of socio-ecological systems.” That chart was accompanied by another evaluation matrix that resembled a Rubik’s cube. One observer joked that she wanted to get it printed on a shirt. In the meantime, the need for action is only getting more urgent.  The United Nations’ annual report on adaptation, which became public just before COP29 began, underscored the life-or-death stakes of an issue that often feels like a forgotten middle child at global climate talks. The U.N. expert who led the report introduced it by saying that “people are already dying, homes and livelihoods are being destroyed, and nature is under assault.” The report estimated the unmet need for adaptation investment at up to $359 billion every year. Notably, this need was not expressed in forested acres or boreholes drilled, but in U.S. dollars. In recent years, as developed countries have belatedly endorsed the idea of a fund for redressing climate-fueled damage — and as the world has verged on breaching the 1.5 degrees C threshold laid out by the Paris accord — some have started to discuss the demise of small island states as an inevitability rather than a possibility. But Nelson said that while some disaster losses are inevitable, Samoa and other countries aren’t ready to admit that they will have to leave their homelands, an outcome that many experts fear will be likely with 1.5 degrees or more of warming.  “We will not give up our land just because we’re facing these issues,” she said. “This is where we come from — if we give up now, it sends the wrong signal.” This story was originally published by Grist with the headline How do you define climate adaptation? Here are 10,000 ways. on Nov 21, 2024.

At COP29, a decade-long effort to realize the ambitions of the Paris agreement could give the world a way to measure the success of climate adaptation.

The essence of the Paris climate agreement was distilled into a single number. The almost 200 countries that signed the pact in 2016 agreed they would try to limit global warming to 1.5 degrees Celsius above pre-industrial levels. Over the past decade, as these countries have rolled out renewable energy installations and decommissioned coal plants, we have been able to evaluate their efforts against this number. (The results have not been promising.)

But the 1.5-degree target was just one element of the Paris accord. The world also committed to throw its weight behind efforts to adapt to the global warming already baked in by centuries of fossil-fueled industrialization. Even if emissions fall, disasters over the next century will displace many millions of people and destroy billions of dollars in property, particularly in developing countries across Africa, Latin America, and Asia. Those countries fought to ensure that adaptation to those hazards was a key pillar of the agreement.

But there’s no one way to measure the success of this commitment. Should the U.N. measure the number of deaths from disasters, or the value of property destroyed in floods, or the incidence of hunger, or the availability of clean water? How will the international community determine the efficacy of adaptation measures like sea walls and drought-resistant crops, given that the disasters they prevent remain so unpredictable?

“There is no one single measure you can use that will apply to all adaptation globally,’” said Emilie Beauchamp, an adaptation expert at the International Institute for Sustainable Development, a think tank, who is participating in adaptation talks at COP29, this year’s U.N. climate conference in Baku, Azerbaijan. “It’s not like when we say, ‘we reduce our emissions.’ You can say we need to reduce vulnerability, but that’s going to change according to whose vulnerability you’re talking about.”

This question is far from academic: Climate change is fueling more frequent and severe disasters, ravaging places with vulnerable infrastructure. In Zambia, electricity service has been reduced to just a few hours a day thanks to drought emptying out a key reservoir. Meanwhile, a year’s worth of rainfall deluged the Valencia region of Spain in just a few days last month, causing flooding that killed more than 200 people. In the United States, warming helped juice the intensity of several major hurricanes that made landfall this year.

Despite the urgency, adaptation hasn’t received much attention at recent U.N. climate talks. This year’s COP is no exception. While the conferences often open with rich countries making major new funding pledges, this year just $60 million in new pledges went to the world’s biggest adaptation fund. That total, raised by European nations and South Korea, is well short of the $300 million the fund had hoped to raise.

While the main target of COP29 is a new agreement on a global finance goal — which could end up well over a trillion U.S. dollars and is intended to help the developing world with all aspects of the climate fight — wealthy countries have refused to reserve a portion of that target for adaptation, in part because adaptation efforts attract far less private investment than renewable energy. In finance talks, developing nations have asked that billions of dollars be set aside for adaptation — a far cry from the $60 million announced at the start of the conference.

Despite the funding impasse, the world is inching closer to finally defining an effort that could make the difference between life and death for millions of people around the world. The U.N. is halfway through a two-year attempt to finally pick “adaptation indicators,” or global yardsticks that will allow every country to measure its climate resilience. This decade-delayed effort to complete the ambitions of the Paris agreement will in theory give the world a way to measure adaptation success.

“We’re hopeful,” said Hawwa Nabaaha Nashid, an official at the environmental ministry of the Maldives, an island state in the Indian Ocean. “If there’s a high-quality [outcome], we can answer the question—how well are we adapting and what needs to be done differently?”

There are still big hurdles to clear. The latest text of the adaptation negotiators were considering, which appeared early Thursday, left out some priorities of developing countries, but negotiators expressed more optimism about the adaptation item than they did about other items such as decarbonization and climate finance.

And the task of selecting indicators is daunting in itself. Last year’s COP saw agreement on specific target areas for adaptation, including water, health, biodiversity, food, infrastructure, poverty, and heritage. But to measure progress in these target areas, negotiators have proposed a whopping 10,000 potential indicators. This eye-popping sum highlights just how fluid and context-dependent the notion of “ climate adaptation” really is. 

Some potential indicators, like “area of contorta pine” (a European Union proposal on biodiversity) and “number of boreholes drilled” (a water proposal from developing countries) seem far too specific, since most of the world doesn’t have significant amounts of contorta pine or get its water by drilling boreholes. Others, such as “types of synergies created” seem so vague as to be almost useless. Some, such as “number of mining operations in protected areas reviewed and temporarily suspended” don’t seem to have anything to do with adapting to climate disasters.

“By the very nature of adaptation being more diffuse and broad, you get a multitude of indicators, sub-indicators, and criteria,” said Kalim Shah, a professor of environmental science at the University of Delaware who has assisted small island states like the Marshall Islands with adaptation planning. “It’s much more diffuse, and maybe that’s part of the problem: too many cooks in the kitchen.”

The major roadblock in these discussions is money. In every negotiation, poor countries have demanded clear language acknowledging that adaptation is impossible without adequate funding, while rich countries have tried to exclude such language and focus on planning and logistics. In the fight over the indicators, the developing world is seeking a commitment to include an indicator that measures “means of implementation” — in other words, a metric for how capable countries are of carrying out their adaptation plans. This would amount to an acknowledgement that funding and capacity are critical to climate adaptation of any kind, whether it’s building new sand dams for pastoral herders or tracking the spread of dengue fever. But even that acknowledgement appears to be controversial.

“It is still a big contention,” said Portia Adade Williams, who is negotiating adaptation needs on behalf of Ghana. “I’m still not sure how we are going to end it. But from a developing country point of view, this would be a complete red line, to have a decision that doesn’t allow us to track [capacity].” 

Nashid, of the Maldives, said the country can’t consider scaling up its adaptation efforts without more money. The country has used huge amounts of reclaimed land to build quasi-artificial islands that can house displaced populations from lower-lying isles.

“We have to exhaust our limited domestic budget to finance our adaptation efforts, taking away from other priority areas such as healthcare and education,” she told Grist.

The capacity issue is especially acute for island nations with small populations, who don’t always have the infrastructure needed to navigate the complex bureaucracy of the multilateral U.N. funds that support adaptation. These low-lying nations often face an almost existential threat from rising sea levels, so they won’t necessarily benefit from just one capital project paid for by these funds — they have to adapt their entire territories in order to survive.

“By the time all these little things have happened for you to get the money, the risks have increased,” said Filomena Nelson, an adaptation negotiator from Samoa who works for the Secretariat of the Pacific Regional Environment Programme, an intergovernmental authority that manages environmental protection across Pacific islands. “It takes forever, it’s complicated, it’s a vicious cycle.”

When negotiators can’t discuss money, adaptation talks tend to get mired in the realm of the abstract. This was evident in Baku this week, where negotiators in one adaptation talk confronted a multi-dimensional graph about “transformational adaptation” with three axes: “time,” “changes in paradigms,” and “changes in the fundamental attributes of socio-ecological systems.” That chart was accompanied by another evaluation matrix that resembled a Rubik’s cube. One observer joked that she wanted to get it printed on a shirt.

In the meantime, the need for action is only getting more urgent. 

The United Nations’ annual report on adaptation, which became public just before COP29 began, underscored the life-or-death stakes of an issue that often feels like a forgotten middle child at global climate talks. The U.N. expert who led the report introduced it by saying that “people are already dying, homes and livelihoods are being destroyed, and nature is under assault.” The report estimated the unmet need for adaptation investment at up to $359 billion every year. Notably, this need was not expressed in forested acres or boreholes drilled, but in U.S. dollars.

In recent years, as developed countries have belatedly endorsed the idea of a fund for redressing climate-fueled damage — and as the world has verged on breaching the 1.5 degrees C threshold laid out by the Paris accord — some have started to discuss the demise of small island states as an inevitability rather than a possibility. But Nelson said that while some disaster losses are inevitable, Samoa and other countries aren’t ready to admit that they will have to leave their homelands, an outcome that many experts fear will be likely with 1.5 degrees or more of warming. 

“We will not give up our land just because we’re facing these issues,” she said. “This is where we come from — if we give up now, it sends the wrong signal.”

This story was originally published by Grist with the headline How do you define climate adaptation? Here are 10,000 ways. on Nov 21, 2024.

Read the full story here.
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In Another Climate and Money Withdrawal, US Pulls Out of Climate Damage Compensation Fund

The Trump administration has told world financial institutions that the U.S. is pulling out of the landmark international climate Loss and Damage Fund

Formalizing another withdrawal from both climate and foreign aid programs, the Trump administration has told world financial institutions that the U.S is pulling out of the landmark international climate Loss and Damage Fund.Climate analysts Monday were critical of the Treasury Department's decision to formally pull out from the fund designed as compensation for damage by polluting nations to poor countries especially hurt by the extreme storms, heat and drought caused by the burning of coal, oil and gas. A Treasury official said in a letter last week that the U. S. board members of the fund were resigning but gave no reason for the withdrawal.“It’s a great shame to see the U.S. going back on its promises," said Mohamed Adow, founder of Power Shift Africa and a veteran of United Nations climate negotiations. "This decision will result in great suffering for some of the poorest and most vulnerable people in the world. These people have contributed the least to the climate emergency they are now living through.”The Treasury did not immediately respond to an email seeking comment.When the fund was agreed upon in 2022, then-President Joe Biden pledged that the U.S., the world's biggest historic carbon dioxide emitter, would contribute $17.5 million. A dozen countries that have polluted less — Australia, Austria, Denmark, France, Germany, Ireland, Italy, Norway, Spain, Sweden, the United Arab Emirates and the United Kingdom — and the European Union have pledged more than the U.S.The two biggest pledges — $104 million — came from Italy and France. As of January, the Loss and Damage Fund had $741.42 million in pledges, according to the United Nations.“The Trump administration’s withdrawal from the Loss and Damage Fund is yet another cruel action that will hurt climate vulnerable lower income nations the most," said Rachel Cleetus, policy director of the climate and energy program at the Union of Concerned Scientists. “The richest nation and the world’s biggest contributor to global heat-trapping emissions is choosing to punch down and walk away from its responsibility toward nations that have contributed the least to the climate crisis and yet are bearing an unjust burden from it.”Poorer nations, often in the global south, had long framed the fund as one of environmental justice. It was an idea that the U.S. and many rich nations blocked until 2022, when they accepted the creation but insisted it was not reparations.“Three long decades and we have finally delivered climate justice,” Seve Paeniu, the finance minister of Tuvalu, said when the UN climate negotiations established the fund. “We have finally responded to the call of hundreds of millions of people across the world to help them address loss and damage.”The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.Copyright 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.Photos You Should See - Feb. 2025

Transportation secretary rescinds Biden memos prioritizing infrastructure resilience to climate change

Transportation Secretary Sean Duffy rescinded memos from the Biden administration prioritizing infrastructure resilience to climate change, according to a Monday press release. According to the press release from the department, the announcement about the rescinding came from Duffy on Monday. The department said the memos “displaced the long-standing authorities granted to States by law, added...

Transportation Secretary Sean Duffy rescinded memos from the Biden administration prioritizing infrastructure resilience to climate change, according to a Monday press release. According to the press release from the department, the announcement about the rescinding came from Duffy on Monday. The department said the memos “displaced the long-standing authorities granted to States by law, added meritless and costly burdens related to greenhouse gas emissions and equity initiatives.” The Trump Transportation Department also put forth a memo of its own dated last Friday in which it called the memos “controversial” and asked for their rescinding. Webpages for the memos on the Federal Highway Administration’s (FWHA) website are both currently displaying “Page Not Found.”  According to a Government Accountability Office report from 2022, one of the memos from 2021 had aims including pushing for states to “invest in projects that upgrade the condition of streets, highways and bridges and make them safe for all users” and “modernizing” those same pieces of infrastructure to make the transport network “more sustainable and resilient to a changing climate.” An archived version of the other memo, which is from 2023, also states that the FWHA would carry on with focusing on “infrastructure that is less vulnerable and more resilient to a changing climate.” The 2021 memo was also superseded by the 2023 memo. Duffy said in the release that his department “is getting back to basics — building critical infrastructure projects that move people and move commerce safely.”  “The previous administration flouted Congress in an attempt to push a radical social and environmental agenda on the American people,” he continued. “This was an act of federal overreach. It stops now.”

Study Says Climate Change Will Even Make Earth's Orbit a Mess

A new study finds that climate change is already causing all sorts of problems on Earth, but soon it will be making a mess in orbit around the planet too

Climate change is already causing all sorts of problems on Earth, but soon it will be making a mess in orbit around the planet too, a new study finds.MIT researchers calculated that as global warming caused by burning of coal, oil, gas continues it may reduce the available space for satellites in low Earth orbit by anywhere from one-third to 82% by the end of the century, depending on how much carbon pollution is spewed. That's because space will become more littered with debris as climate change lessens nature's way of cleaning it up.Part of the greenhouse effect that warms the air near Earth's surface also cools the upper parts of the atmosphere where space starts and satellites zip around in low orbit, That cooling also makes the upper atmosphere less dense, which reduces the drag on the millions of pieces of human-made debris and satellites.That drag pulls space junk down to Earth, burning up on the way. But a cooler and less dense upper atmosphere means less space cleaning itself. That means that space gets more crowded, according to a study in Monday's journal Nature Sustainability.“We rely on the atmosphere to clean up our debris. There’s no other way to remove debris,” said study lead author Will Parker, an astrodynamics researcher at MIT. “It’s trash. It’s garbage. And there are millions of pieces of it.”Circling Earth are millions of pieces of debris about one-ninth of an inch (3 millimeters) and larger — the width of two stacked pennies — and those collide with the energy of a bullet. There are tens of thousands of plum-sized pieces of space junk that hit with the power of a crashing bus, according to The Aerospace Corporation, which monitors orbital debris. That junk includes results of old space crashes and parts of rockets with most of it too small to be tracked.“There used to be this this mantra that space is big. And so we can we can sort of not necessarily be good stewards of the environment because the environment is basically unlimited,” Parker said. But a 2009 crash of two satellites created thousands of pieces of space junk. Also NASA measurements are showing measurable the reduction of drag, so scientists now realize that that “the climate change component is really important,” Parker said.The density at 250 miles (400 kilometers) above Earth is decreasing by about 2% a decade and is likely to get intensify as society pumps more greenhouse gas into the atmosphere, said Ingrid Cnossen, a space weather scientist at the British Antarctic Survey who was not part of the research. Cnossen said in an email that the new study makes “perfect sense” and is why scientists have to be aware of climate change's orbital effects “so that appropriate measures can be taken to ensure its long-term sustainability.”The Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.Copyright 2025 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.Photos You Should See - Feb. 2025

What Kind of Workout Clothes Are Best for the Environment?

Every fabric has an environmental cost. Here’s how to make informed choices.

Chances are, your favorite exercise attire is synthetic, made from petroleum-based fibers like nylon, spandex and polyester. Materials that don’t exactly scream “climate friendly.”Natural fibers have issues, too: Growing cotton can use huge amounts of water and pesticides, the sheep that give us wool emit methane, and processing bamboo can produce a lot of pollution. Altogether, the apparel and footwear industries account for more than 8 percent of global greenhouse gas emissions.So if you want to keep your body fit while also keeping the planet healthy, what should you do?Consider recycled fibersThere’s a lot of plastic polluting our lands and waters. Some companies have capitalized on that, melting down plastic waste and extruding it into yarn.Karen Leonas, a professor of textile sciences at North Carolina State University, said those materials could be a good choice for workout clothes.“Any time you can find something that contains recycled fibers, that’s definitely a plus,” she said. “Whether you’re looking at climate, water, solid waste or even social sustainability issues.”Lewis Perkins, president of the nonprofit Apparel Impact Institute, also said he liked recycled fibers. But he cautioned that they’re a “transitional solution,” as he believes the ultimate goal should be reducing the prevalence of single-use plastic in the first place.We are having trouble retrieving the article content.Please enable JavaScript in your browser settings.Thank you for your patience while we verify access. If you are in Reader mode please exit and log into your Times account, or subscribe for all of The Times.Thank you for your patience while we verify access.Already a subscriber? Log in.Want all of The Times? Subscribe.

America's Butterflies Are Disappearing At 'Catastrophic' Rate, Study Says

The number of the winged beauties down 22% since 2000, according to new research.

WASHINGTON (AP) — America’s butterflies are disappearing because of insecticides, climate change and habitat loss, with the number of the winged beauties down 22% since 2000, a new study finds.The first countrywide systematic analysis of butterfly abundance found that the number of butterflies in the Lower 48 states has been falling on average 1.3% a year since the turn of the century, with 114 species showing significant declines and only nine increasing, according to a study in Thursday’s journal Science.“Butterflies have been declining the last 20 years,” said study co-author Nick Haddad, an entomologist at Michigan State University. “And we don’t see any sign that that’s going to end.”A team of scientists combined 76,957 surveys from 35 monitoring programs and blended them for an apples-to-apples comparison and ended up counting 12.6 million butterflies over the decades. Last month an annual survey that looked just at monarch butterflies, which federal officials plan to put on the threatened species list, counted a nearly all-time low of fewer than 10,000, down from 1.2 million in 1997.Many of the species in decline fell by 40% or more.David Wagner, a University of Connecticut entomologist who wasn’t part of the study, praised its scope. And he said while the annual rate of decline may not sound significant, it is “catastrophic and saddening” when compounded over time.“In just 30 or 40 years we are talking about losing half the butterflies (and other insect life) over a continent!” Wagner said in an email. “The tree of life is being denuded at unprecedented rates.”The United States has 650 butterfly species, but 96 species were so sparse they didn’t show up in the data and another 212 species weren’t found in sufficient number to calculate trends, said study lead author Collin Edwards, an ecologist and data scientist at the Washington Department of Fish and Wildlife.“I’m probably most worried about the species that couldn’t even be included in the analyses” because they were so rare, said University of Wisconsin-Madison entomologist Karen Oberhauser, who wasn’t part of the research. Haddad, who specializes in rare butterflies, said in recent years he has seen just two endangered St. Francis Satyr butterflies — which only live on a bomb range at Fort Bragg in North Carolina — “so it could be extinct.” Some well-known species had large drops. The red admiral, which is so calm it lands on people, is down 44% and the American lady butterfly, with two large eyespots on its back wings, decreased by 58%, Edwards said. Even the invasive white cabbage butterfly, “a species that is well adapted to invade the world,” according to Haddad, fell by 50%. “How can that be?” Haddad wondered.Cornell University butterfly expert Anurag Agrawal said he worries most about the future of a different species: Humans.“The loss of butterflies, parrots and porpoises is undoubtedly a bad sign for us, the ecosystems we need and the nature we enjoy,” Agrawal, who wasn’t part of the study, said in an email. “They are telling us that our continent’s health is not doing so well ... Butterflies are an ambassador for nature’s beauty, fragility and the interdependence of species. They have something to teach us.”Oberhauser said butterflies connect people with nature and that “calms us down, makes us healthier and happier and promotes learning.”What’s happening to butterflies in the United States is probably happening to other, less-studied insects across the continent and world, Wagner said. He said not only is this the most comprehensive butterfly study, but the most data-rich for any insect.Butterflies are also pollinators, though not as prominent as bees, and are a major source of pollination of the Texas cotton crop, Haddad said.The biggest decrease in butterflies was in the Southwest — Arizona, New Mexico, Texas and Oklahoma — where the number of butterflies dropped by more than half in the 20 years.“It looks like the butterflies that are in dry and warm areas are doing particularly poorly,” Edwards said. “And that kind of captures a lot of the Southwest.”Edwards said when they looked at butterfly species that lived both in the hotter South and cooler North, the ones that did better were in the cooler areas.Climate change, habitat loss and insecticides tend to work together to weaken butterfly populations, Edwards and Haddad said. Of the three, it seems that insecticides are the biggest cause, based on previous research from the U.S. Midwest, Haddad said.“It makes sense because insecticide use has changed in dramatic ways in the time since our study started,” Haddad said.Habitats can be restored and so can butterflies, so there’s hope, Haddad said.“You can make changes in your backyard and in your neighborhood and in your state,” Haddad said. “That could really improve the situation for a lot of species.”Follow Seth Borenstein on X at @borenbearsThe Associated Press’ climate and environmental coverage receives financial support from multiple private foundations. AP is solely responsible for all content. Find AP’s standards for working with philanthropies, a list of supporters and funded coverage areas at AP.org.

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