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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
Podcast
Hurricane Season 2021
Senior Climate Scientist Astrid Caldas elaborates on Ida—and the many other deadly and damaging 2021 storms made worse by climate change.
Report
One Year of Science Under Biden
UCS experts and analysts evaluate the Biden-Harris administration's actions across nine issue areas.
Video
Ending Sole Authority
In the United States, the sole authority to order the use of nuclear weapons belongs to the president.
Feature
50 Years of Science and Action
Since our founding in 1969 we've helped address some of the world’s most pressing problems.
How we work
Accomplishments
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Helped Pass Climate and Equitable Jobs Act in Illinois
The new law—which UCS tirelessly advocated for with the Illinois Clean Jobs Coalition—sets a goal of 100% clean energy, while prioritizing environmental justice communities for pollution reductions.