kittirat roekburi/Shutterstock
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
Report
Science and Democracy Under Siege
This administration's first 6 months have been characterized by destruction, division, and chaos.
Activist Resource
August Congressional Recess Action Toolkit
Tools to tell your legislators that anti-science actions are dangerous for you and your community.
Report
Decades of Deceit
Why the case against the major fossil fuel companies for fraud and climate damages is so strong.
Blog Series
Scientists Respond to the Trump Administration
Our experts and analysts weigh in on the latest developments from the White House.
How we work
Accomplishments
S. Young/UCS
Historic Win for Survivors of Radiation Exposure
For years, UCS has worked with communities exposed to radiation from US nuclear weapons activities for justice and compensation. Legislation providing compensation lapsed in 2024; after much advocacy, Congress renewed and expanded it to cover more people.