NASA
We use science to make change happen.
The Union of Concerned Scientists is a member-supported nonprofit that’s fighting for a safer and healthier world.
Our work
Feature
UCS vs Anti-Science Actions
We're suing the Trump administration on a wide range of issues—and winning.
Activist Resource
Protect the Vote in November 2026
With the 2026 midterm election on the near horizon, we must do everything we can to safeguard fair elections and protect the right to vote.
Report
Wringing the West Dry
Climate change is disrupting the already scarce water resources of the Western United States.
Explainer
Hurricanes and Climate Change
Increasingly destructive hurricanes are putting a growing number of people and communities at risk.
How we work
Accomplishments
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UCS Leads Amicus Brief to US Supreme Court
In support of an important climate deception case, UCS led an expert brief filed with the Supreme Court documenting ExxonMobil and Suncor Energy’s concealment and denial of the hazards they knew would result from using their fossil fuel products.