50 Years of Science and Action

We just turned 50 years old—and we're celebrating our achievements >

Science for a healthy planet and safer world.

Challenging Trump on the Paris Agreement

The withdrawal was both ignorant and irresponsible. What can we do?

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Stand Up for Science

UCS is closely monitoring the Trump administration—and mobilizing to defend science.
Clean Energy Progress

We animated 18 years of renewable progress in a single GIF.

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Latest News

California’s Infrastructure Earns a C-. We Need More Equitable and Climate-Safe Infrastructure Now

Blog Post

Hot Arctic and a Chill in the Northeast: What’s Behind the Gloomy Spring Weather?

Blog Post

A Stroller Debacle at CPSC Politicizes Child Safety and I Have No Chill

Blog Post

5 Reason’s Why HB 6, Ohio’s Nuclear Plant Subsidy Proposal, Should Be Rejected

Blog Post

U.S. House Hearing Sets the Stage for Progress on PFAS

Press Release

Three Ways Federal Infrastructure Policy Can Speed Up Our Clean Energy Transition

Blog Post

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Science Network

Our network of more than 24,000 technical experts advancing science-based solutions for a healthy planet and a safer world.

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New Mexico Passes UCS-Supported Carbon-Free Electricity Bill

After years of UCS coalition advocacy and analysis, it's now law in New Mexico that 100 percent of the state’s electricity must come from carbon-free resources by 2045.

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50 Years of Science and Action

Science for a healthy planet and safer world.

Challenging Trump on the Paris Agreement

Stand Up for Science

Clean Energy Progress

Latest News

California’s Infrastructure Earns a C-. We Need More Equitable and Climate-Safe Infrastructure Now

Hot Arctic and a Chill in the Northeast: What’s Behind the Gloomy Spring Weather?

A Stroller Debacle at CPSC Politicizes Child Safety and I Have No Chill

5 Reason’s Why HB 6, Ohio’s Nuclear Plant Subsidy Proposal, Should Be Rejected

U.S. House Hearing Sets the Stage for Progress on PFAS

Three Ways Federal Infrastructure Policy Can Speed Up Our Clean Energy Transition

Stay Informed via email from UCS

We depend on your support

Science Network

Meet our Experts

Marcia DeLonge

Sr. Scientist, Food and Environment

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