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Climate
Report
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Decades of Deceit

Why the case against the major fossil fuel companies for fraud and climate damages is so strong.

Climate Change

Climate change is one of the most devastating problems humanity has ever faced—and the clock is running out.

Learn more about Climate
  • Impacts
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Call on Congress to invest in affordable climate resilient housing.

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Energy
Report
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Keeping Everyone's Lights On

The grid today is woefully unprepared to meet our current climate reality.

Energy

The energy choices we make today could make or break our ability to fight climate change.

Learn more about Energy
  • Renewable Energy
  • Nuclear Power
  • Fossil Fuels
  • Solutions

Demand power plant outage information be made public.

Act Now
Transportation
Report
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Harnessing the Power of Electric Vehicles

UCS research shows that vehicle-grid integration (VGI) enables electric system savings, ranging from $1.8 billion - $11.7 billion per year in 2045.

Transportation

Our transportation system is outdated and broken—and it needs to change.

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Tell Congress we need electric vehicle infrastructure nationwide.

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Food
Activist Resource
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Guiding California's Land Transitions Toward Justice and Equity

Analyses of the current challenges and solutions in California's cropland transition.

Food and Farms

The US food system should be providing healthy, sustainable food for everyone. Why isn’t it?

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  • Sustainable Agriculture
  • Healthy Food
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The farm bill must center communities, not corporations.

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Nuclear Weapons
Report
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Plutonium Pit Production

The US plan to build new plutonium pits for nuclear weapons is unnecessary, risky, and dangerous to the health of workers and communities.

Nuclear Weapons

They’re the most dangerous invention the world has ever seen. Can we prevent them from being used again?

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  • Worldwide
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Tell Congress: No more nuclear weapons testing.

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Science & Democracy
Report
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Access Denied

The Trump administration is evading legal requirements as it attacks a wide range of public health, environmental, and safety rules.

Science and Democracy

Democracy and science can be powerful partners for the public good—and both are under attack.

Learn more about Science & Democracy
  • Independent Science
  • Evidence-Based Decisions
  • A Healthier Democracy

Help strengthen scientific integrity at federal agencies.

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Josh Blatt

Josh Blatt

Communications Officer
Feature
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Dirty Air, Dirty Deeds

President Trump has given free rein to some of the most polluting industries in the country.
BLOG POST
The back of a Union of Concerned Scientists shirt where the word "concerned" is crossed out and replaced with "pissed-off".

3 Tips for Getting Started in Science Advocacy

Our top tips for early career scientists as they explore the world of science advocacy.
Interactive Map
a screenshot of a map showing US chemical facilities

Interactive Map

Nearly 4.6 million people across 46 US states and Puerto Rico live within two miles of at least one exemption-eligible facility.
Press Release
A thumbnail that reads 'For Immediate Release'
December 3, 2025

Weakened Fuel Economy Standards Will Likely Harm People, Environment While Raising Prices at the Pump

Press Release
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December 2, 2025

NRC’s Rushed Approval of Bill Gates’ Experimental Wyoming Nuclear Reactor will Imperil Public Health, the Environment

Jules Barbati-Dajches

Jules Barbati-Dajches

Analyst
Video
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Announcing our 2025 Annual Report

Thanks to your support, UCS has been monitoring and responding to unprecedented attacks on science. We're seeing success.
For Experts
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How Scientists Can Stand Up for Democracy

Watch Today
Press Release
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November 22, 2025

COP30 Barely Delivers, Rich Nations Continue to Force Inequitable Climate Outcomes

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