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Union of Concerned Scientists

@ucs.org
37K followers 1.4K following 2.9K posts

The Union of Concerned Scientists puts rigorous, independent science to work to solve our planet's most pressing problems. ucs.org

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Union of Concerned Scientists @ucs.org · 20h
HAPPENING NOW: Gretchen Goldman, UCS President & CEO testifies to the Senate Environment & Public Works Committee on the Trump administration's unrelenting attacks on science: “Rigorous, independent science has long been a cornerstone of US leadership...🧵
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Union of Concerned Scientists @ucs.org · 21h
WATCH LIVE: Dr. Gretchen Goldman, UCS President & CEO testifies to the Senate Environment & Public Works Committee on the Trump administration's unrelenting attacks on science:
youtube.com
The science Big Oil wants to hide from you
YouTube video by Senate Environment & Public Works Committee
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Union of Concerned Scientists @ucs.org · 29/09/2026
"Science has always depended on people sharing ideas across institutions, disciplines, communities, and borders. Protecting the people who make that exchange possible is part of protecting science, too," writes UCS's Tosin Fadeyi in her latest post.
blog.ucs.org
The United States Will Be Worse off for Losing International Scientists
The U.S. has long benefited from the scholarship of international scientists. The Trump administration's policies are forcing many to reconsider their careers here.
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Union of Concerned Scientists @ucs.org · 28/09/2026
Justice Samuel Alito has recused himself from the upcoming Suncor v. Boulder climate case. His oil stock ownership & relationship with investor Paul Singer has been widely reported. “Justice Alito's decision is the bare minimum we should expect from a justice on our nation’s highest court.”
nam04.safelinks.protection.outlook.com
Justice Alito’s Recusal from Climate Case is the “Bare Minimum” to Address Glaring Conflict of Interest
Office of the Clerk for SCOTUS announced Justice Alito will not participate in the Suncor v. Boulder case, which SCOTUS is set to hear arguments for in one week. Statement by Kathy Mulvey at the Union...
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Union of Concerned Scientists @ucs.org · 28/09/2026
An unelected political appointee is disobeying the will of Congress & the rule of law by withholding funds for programs approved with bipartisan support. Blatantly unconstitutional. Flagrantly anti-science. The latest example of authoritarianism from the Trump admin.
npr.org
What to know about the $810 million in spending canceled by President Trump
President Trump announced plans to cancel $810 million in Congressionally approved spending, a move that some in his own party are calling illegal.
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Marc Alessi @marc-alessi.bsky.social · 28/09/2026
New Commentary out in Nature Climate Action: we now live in a fundamentally different climate system due to the burning of fossil fuels. Because of this, any extreme weather event now occurs in a changed climate and is influenced by fossil fuel-driven climate change to some degree.
nature.com
The next phase of climate attribution - npj Climate Action
Attribution science has transformed our understanding of how anthropogenic emissions shape extreme weather events, yet the field remains constrained by repeatedly demonstrating anthropogenic influence...
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Union of Concerned Scientists @ucs.org · 28/09/2026
Today, the Trump administration finalized a rollback of fuel economy standards for passenger cars and trucks. This move effectively kills the nation's CAFE standards, a program that has saved drivers $321 billion in fuel costs since 2010. Read UCS Statement: act.ucs.org/46NApCk
“The federal government’s decision to gut fuel economy standards is a handout to automakers and oil companies that will strap American consumers already struggling with an affordability crisis...Weakening these standards means drivers will spend more on fuel while having fewer options to choose efficient vehicles."
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Union of Concerned Scientists @ucs.org · 27/09/2026
Write today and demand your members of Congress reject a liability shield for the fossil fuel industry. Take action: act.ucs.org/4iG87AS Learn more in our Decades of Deceit timeline: act.ucs.org/3TOOwEv
1979 Exxon memo warned CO2 buildup could cause global environmental harm, urging limits on fossil fuel use.
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Union of Concerned Scientists @ucs.org · 25/09/2026
👏👏👏
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UCS Climate & Accountability Campaigns @ucsclimate.bsky.social · 25/09/2026
This weekend the NE US is facing a strong, rare Sept Nor'easter. Wind damage & coastal flooding (worsened by sea level rise) are expected. In this 2025 blog, UCS’s @marc-alessi.bsky.social, explains how nor'easters are being influenced by warmer oceans, courtesy of climate change.
blog.ucs.org
Hurricanes, Nor’easters, Subtropical Storms! What’s the Difference?
Different types of storms explained.
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Union of Concerned Scientists @ucs.org · 25/09/2026
UCS is proud to endorse Michigan's Proposal 2 to get money out of state politics. Campaign contributions from utilities like DTE & Consumers make it harder to pass strong policies to ensure a just transition to clean energy. Please vote YES on prop 2 this November! mopupmichigan.org
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Union of Concerned Scientists @ucs.org · 25/09/2026
Billions in transportation funding are on the chopping block starting October 1. The result? Less investment in transit, rail, road safety, and affordable ways to get around when people need it most.
blog.ucs.org
Extra Time, Quiet Cuts: Surface Transportation Reauthorization Extension
Layoffs, construction stoppages, and service cuts could follow from a sudden break in federal funding
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Union of Concerned Scientists @ucs.org · 24/09/2026
A report by US Senate leaders details "transactional corruption" between the fossil fuel industry and the Trump administration. Dismantling pollution protections. Installing oil execs at the EPA. Over $190 BILLION in industry subsidies over the next decade. And that's just the tip of the iceberg🧵⬇️
Graphic showing a black-and-white government building beneath several industrial smokestacks releasing thick clouds of dark smoke. An American flag flies above the building. Large red and white text reads: “The Billion Dollar Deal: How the Fossil Fuel Industry Bought the Trump Administration, Cashed In, and Left Americans to Pay the Price.”
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Union of Concerned Scientists @ucs.org · 24/09/2026
Gretchen Goldman, PhD is in these streets for NYC Climate Week with an update on the vibe. Learn more about UCS’s presence and activities throughout the week: act.ucs.org/4hek7bO #ClimateWeekNYC
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Marc Alessi @marc-alessi.bsky.social · 24/09/2026
For the next year, we can expect to see precipitation and other weather extremes unlike anything we’ve seen before. Why? When the oceans are warmer, thanks to climate change and the developing El Niño, they release vast amounts of moisture into the atmosphere, which act as extra fuel for any storm.
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Union of Concerned Scientists @ucs.org · 24/09/2026
¡Una transición energética justa no solo es posible, sino esencial! 🌱 De Santa Marta, Colombia, a #ClimateWeekNYC: seguimos aprendiendo e impulsando soluciones de energía limpia que beneficien a las comunidades y nos alejen de los combustibles fósiles. 🔗Aprende más: act.ucs.org/3T77w0O
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Union of Concerned Scientists @ucs.org · 24/09/2026
Write today and demand your members of Congress reject a liability shield for the fossil fuel industry. Take action: act.ucs.org/4iG87AS Learn more in our Decades of Deceit timeline: act.ucs.org/3TOOwEv
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Union of Concerned Scientists @ucs.org · 24/09/2026
TONIGHT: The midterms are less than 40 days away! Learn how you can protect democracy and help ensure that we have a fair, free, and safe election this November. RSVP now: act.ucs.org/4z3buXF
Join UCS and Protect Democracy for a virtual briefing on the threats we face to our elections, what to watch out for in the coming weeks leading up to Election Day, and ways you can take action and get involved in your community or state.

Date: Thursday, September 24
Time: 8:00–9:00 p.m. ET
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Prof William Ripple @williamripple.bsky.social · 23/09/2026
We invite everyone to endorse the Declaration of a Planetary Emergency, part of the upcoming World Scientists’ Warning to Humanity: A Third Notice. Please add your name and share widely. Every endorsement helps show public concern about the future of our planet. docs.google.com/forms/d/e/1F...
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Union of Concerned Scientists @ucs.org · 23/09/2026
At the UN Climate Summit today, it’s crucial for world leaders to commit to climate action guided by the latest climate science and climate justice.
un.org
Climate Summit 2026 | United Nations
https://webtv.un.org/en/asset/k1z/k1zg4qsbxi23 September 2026: Ten years after the Paris Agreement, the climate crisis has entered a new phase in which overshoot is now inevitable, while the ener...
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Union of Concerned Scientists @ucs.org · 23/09/2026
“Disinformation is easier to fight when we prepare for it,” writes UCS’s climate disinformation expert Kate Cell in her latest blog post. Learn what to do—and what not to do—when you encounter disinformation online, especially ahead of the upcoming midterm elections.
blog.ucs.org
Congratulations! You’re a Disinformation Target. 6 Ways to Head Off the Deception
In the final months before our last national election in 2024, a vicious lie targeting Haitian immigrants in Springfield, Ohio, raced across social media and into the presidential campaign. Donald Trump repeated it during a nationally televised debate. JD Vance amplified it. Days later, Vance told C
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Union of Concerned Scientists @ucs.org · 23/09/2026
“President Trump’s statement to the UN clearly constitutes an implied threat to use overwhelming nuclear force against Iran and the Iranian people broadly. This would be a nuclear genocide. Any threat to use nuclear weapons is unacceptable, and his decision to do so should be strongly condemned..."
ucs.org
President Trump’s Implied Threat of Nuclear Annihilation Increases Global Risks of Nuclear Proliferation
President Trump’s threats to annihilate Iran with nuclear weapons are dangerous, making it likelier that other countries seek nuclear weapons for protection.
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UCS Climate & Accountability Campaigns @ucsclimate.bsky.social · 21/09/2026
Voluntary standards put forward by bodies like GHG Protocol, Science-Based Targets Initiative & International Standards Organization play an important role in helping companies understand their climate impact and make choices that benefit their bottom lines and protect the health of people & planet.
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Katie Surma @katiesurma.bsky.social · 16/09/2026
At least 124 environmental defenders were killed in 2025. Organized crime, extractive industries and authoritarian governments all contributed to the violence, a new report says. insideclimatenews.org/news/1509202...
insideclimatenews.org
An Environmental Defender Is Murdered Every Three Days - Inside Climate News
At least 124 people were killed in 2025 for protecting their homelands, forests, farms and waterways from pollution and other harms, according to a new report.
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Union of Concerned Scientists @ucs.org · 22/09/2026
🎬 We’re proud to support The Lines We Live On, a docuseries uplifting the voices & wisdom of environmental justice leaders at #ClimateWeekNYC. Learn more: thelinesweliveon.movingforwardnetwork.org
Poster for a Climate Week film screening titled 'The Lines We Live On' at NRDC NYC office on Sept 23, highlighting environmental justice stories.
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Make Polluters Pay International @makepolluterpayint.bsky.social · 21/09/2026
🌍 Today at the UN, we presented 2 million+ signatures calling for fossil-fuel companies to pay for the climate damage they cause. The powerful response: “Polluters must pay… We are with you. Use every tool at your disposal to hold the polluters accountable. You are on the right side of history."
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Union of Concerned Scientists @ucs.org · 22/09/2026
Esta semana Casa Pueblo dice presente en NYC Climate Week para exigir una transformación energética resiliente, inteligente y con el bienestar de las comunidades en mente. UCS se habló con su director ejecutivo Arturo Massol Deyá sobre el tema. Escucha nuestro podcast: act.ucs.org/4ybOPZ3
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Union of Concerned Scientists @ucs.org · 22/09/2026
“Every author volunteered their time and expertise to help ensure that decisionmakers, community leaders, and the broader public have access to the latest climate science…What happens along our coasts affects all of us, no matter where we live...” UCS Statement:
ucs.org
Union of Concerned Scientists expert co-authors commentary outlining research priorities for robust US climate assessments
Senior Policy Director for the Climate and Energy program Dr. Rachel Cleetus is a co-author of the commentary “Research priorities for robust climate assessments in the United States."
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Union of Concerned Scientists @ucs.org · 22/09/2026
“Scientific grants should be judged by scientific expertise, not political ideology,” said UCS’s Jennifer Jones to @sciam.bsky.social. If finalized, she says, the reported plans would “upend the way we do science in this country.”
scientificamerican.com
What a Trump order to put political appointees in charge of NIH funding would mean for science
Advocates and scientists warn that giving political appointees power over research grants would “upend” U.S. science
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Alt US Forest Service @altusfs.altgov.info · 20/09/2026
“America’s public lands are among our nation’s greatest treasures. Protecting them requires more than celebrating them. It requires defending the science, scientific workforce, and public institutions that make stewardship possible.” - @julianjonreyes.bsky.social
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Union of Concerned Scientists @ucs.org · 21/09/2026
The Trump administration is, once again, threatening to take control of billions of dollars of biomedical and public health research funds at the National Institutes of Health, an agency focused on facilitating research and producing reliable data on public health and safety to protect all of us.
nytimes.com
White House Moves to Take Control of N.I.H. Grants (Gift Article)
Federal officials are drafting an executive order that would place grants under review by an outside panel, the latest effort to redirect billions of dollars in research spending.
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Union of Concerned Scientists @ucs.org · 21/09/2026
Concerned about the midterms? Get the latest from UCS and Protect Democracy on the threats we face from the Trump administration, what to watch for in the coming weeks, and ways you can take action to ensure a fair, free, and safe election this November. Info & RSVP: act.ucs.org/4z3buXF
Promotional graphic for Science Rising National Call on election threats featuring speaker Corey Dukes, scheduled for September 24, 8-9 p.m. ET.
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Union of Concerned Scientists @ucs.org · 21/09/2026
🌍 What do Erin Brockovich, António Guterres, and UCS President @gretchentg.bsky.social have in common? They were all named to @the-independent.com's list of the world's top 100 campaigners, change makers & innovators who are working to turn the tide on the climate crisis.
the-independent.com
The Independent Climate 100 List 2026
Back for its third year, The Independent is proud to publish its list of the world’s leading environmentalists – marking the campaigners, change makers and innovators who are making a positive and sig...
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Union of Concerned Scientists @ucs.org · 19/09/2026
Join us for conversation on Big Oil’s efforts to avoid climate accountability and how communities are fighting to protect their right to seek justice. Learn more: act.ucs.org/4gZ2Zqh
Join us for conversation on Big Oil’s efforts to avoid climate accountability and how communities are fighting to protect their right to seek justice. Learn more & register:
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Center for Climate Integrity @climateintegrity.org · 18/09/2026
Come see us at #ClimateWeekNYC! 👋 Next Tuesday (9/22), we’ll be co-hosting a panel with @ucs.org, moderated by @emorwee.bsky.social, to discuss how Big Oil is pulling every lever to escape accountability for its role in the climate crisis — and how communities across the country are fighting back.
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Union of Concerned Scientists @ucs.org · 18/09/2026
We're excited to be part of New York Climate Week! 🌎 #ClimateWeekNYC
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Union of Concerned Scientists @ucs.org · 18/09/2026
UCS’s Julian Reyes analyzes the Trump administration’s continued attacks on forestry research, federal land management agencies, and the scientific workforce that supports effective decision-making. A must-read for National Public Lands Month. Read his blog:
act.ucs.org
What Teddy Roosevelt Knew and Trump Doesn't Get: Public Lands Need Science  
US Forest Service founders Gifford Pinchot and President Teddy Roosevelt would be rolling in their graves knowing what has become of the world’s largest wildland fire research organization, the very institution they helped build. Teddy Roosevelt helped establish 230 million acres of public lands dur
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Union of Concerned Scientists @ucs.org · 17/09/2026
New York Climate Week is coming! We’re excited to share that UCS President & CEO Gretchen Goldman, PhD will join a powerhouse lineup of community leaders, journalists, elected officials, & scientists to collaborate on critical issues related to energy, impact, and action. ➡️ bit.ly/4A59QWv
🗽New York Climate Week is right around the corner! We’re excited to share that UCS President and CEO Gretchen Goldman will be joining a powerhouse lineup of community leaders, journalists, elected officials, and scientists to collaborate on issues of energy, impact, and action—what's happening in climate, and what's at stake.

Learn more: https://bit.ly/4A59QWv
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Center for Climate Integrity @climateintegrity.org · 16/09/2026
🚨 VICTORY! The Big Oil immunity bill has stalled (for now) after the House Judiciary Committee adjourned before bringing the bill for a vote. This fight is far from over, but today is a victory for those who agree that no industry should be above the law.
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Union of Concerned Scientists @ucs.org · 17/09/2026
🌎 A WIN FOR CLIMATE! The Big Oil immunity bill has been halted for now after the House Judiciary Committee adjourned before bringing it to a vote. The fight is not over, but today we can celebrate continuing to hold polluters accountable for their decades of climate disinformation.
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Union of Concerned Scientists @ucs.org · 17/09/2026
Join UCS and Protect Democracy for a virtual briefing on the threats we face to our elections, what to watch out for in the coming weeks leading up to Election Day, and ways you can take action and get involved in your community or state. Info & RSVP: act.ucs.org/4z3buXF
Promotional graphic for Science Rising National Call on election threats featuring speaker Corey Dukes, scheduled for September 24, 8-9 p.m. ET.
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Union of Concerned Scientists @ucs.org · 16/09/2026
UCS’s Dr. Laura Grego joined @npr.org's Morning Edition to discuss reports that the United States has stationed a weapon in space and what this development could mean for a new space race.
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Union of Concerned Scientists @ucs.org · 15/09/2026
Big Oil denying the hazards they knew would result from the use of their fossil fuel products.
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Union of Concerned Scientists @ucs.org · 15/09/2026
"This indefensible, dangerous bill seeks to put an industry that has been lying to the public for decades above the law. And the cherry on top of this sweet giveaway to polluters: the bill attempts to codify climate science denial by misrepresenting the field of attribution science."—Kathy Mulvey
ucs.org
Big Oil Immunity Bill Connected to Prominent Right-Wing Operative Leonard Leo in House Judiciary Committee Markup
Big Oil Immunity Bill Connected to Prominent Right-Wing Operative Leonard Leo in House Judiciary Committee Markup
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Union of Concerned Scientists @ucs.org · 15/09/2026
Stefano Cataldi, a neuroscientist and Science Network member, has realized that his work in science advocacy has become just as important as his work as a researcher. As UCS celebrates Early Career Scientist Month, his story and advocacy experience are an inspiration to others.—Via Nature
nature.com
Why this neuroscientist is taking the plunge into science advocacy
As funding cuts reshape the US research landscape, Stefano Cataldi is turning towards policy and advocacy work to defend science.
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Physics Today @physicstoday.aip.org · 15/09/2026
@dkspaulding.bsky.social’s shock-wave studies on minerals to understand planetary formation had significant overlap with research on stockpile stewardship of nuclear weapons. Now he applies that knowledge at @ucs.org to work toward nuclear disarmament. #whatcanphysicistsdo
physicstoday.aip.org
Dylan Spaulding merges science and politics to push for nuclear peace
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Union of Concerned Scientists @ucs.org · 14/09/2026
NEW: Today, in a cruel disregard for people's health, the Trump administration rolled back critical power plant carbon standards. The EPA is prioritizing fossil fuel industry profits while saddling the public with the costly, harmful consequences of carbon pollution. 🧵⬇️
ucs.org
“Cruel Disregard for People’s Health”—EPA Repeals Power Plant Carbon Standards, Proposes Eliminating Its Authority to Regulate Heat-trapping Emissions from Coal and Gas Plants
“Cruel Disregard for People’s Health”—EPA Repeals Power Plant Carbon Standards, Proposes Eliminating Its Authority to Regulate Heat-trapping Emissions from Coal and Gas Plants
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Gretchen Goldman, PhD @gretchentg.bsky.social · 14/09/2026
I and @ucs.org have a great lineup for #ClimateWeekNYC! Check out our events all week and see you there! Event details and rsvp links here: www.ucs.org/ucs-nyc-clim...
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Union of Concerned Scientists @ucs.org · 14/09/2026
UCS’s Julian Reyes analyzes the Trump administration’s continued attacks on forestry research, federal land management agencies, and the scientific workforce that supports effective decision-making. A must-read for #NationalPublicLandsMonth. Read his blog: act.ucs.org/4yCvFv8
A person stands beneath a massive natural sandstone arch with a river and lush greenery flowing through a sunlit canyon. Quote by UCS's Chief of Staff Julian Reyes : ""Science is—and always has been—the foundation for responsible public lands management and effective conservation."
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Center for Climate Integrity @climateintegrity.org · 14/09/2026
🚨BIG OIL IS RACING TO BE ABOVE THE LAW🚨 HR 8330, which aims to give Big Oil immunity from all climate laws and lawsuits, will be considered in the House Judiciary Committee on Wednesday. No industry should be above the law — especially one that has lied to the American people for decades.
climateintegrity.org
Big Oil Immunity Bill Will Be Considered in House Committee Wednesday | Center for Climate Integrity
Despite Widespread Opposition, Republicans Will Push Legislation in the House Judiciary Committee to Shield Fossil Fuel Companies from Climate Laws and Lawsuits
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