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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
Blog post
Can We Still Limit Global Warming to 1.5°C?
It depends on how you define “possible.”
Feature
The Climate Action Button
Clicking the button won't solve the climate crisis. But it'll help.
Report
Philadelphia Refinery Closure
There are many opportunities to learn from the victories and missteps associated with the PES refinery closure.
Report
Invisible Threat, Inequitable Impact
Ethylene oxide poses a largely invisible and unrecognized threat to nearby communities.
How we work
Accomplishments
USDA/Flickr
Decades of UCS Work Reflected in White House Guidance
The White House’s Office of Science and Technology Policy issued a landmark framework for scientific integrity that will protect federal science from undue political interference—guidance that reflects decades of UCS research and advocacy.