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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
Report
Science and Democracy Under Siege
This administration's first 6 months have been characterized by destruction, division, and chaos.
Report
Access Denied
The Trump administration is evading legal requirements as it attacks a wide range of public health, environmental, and safety rules.
Video
The Infuriating Link Between Wildfires and Fossil Fuel Companies
Groundbreaking science shows how oil and gas companies bear at least some responsibility for worsening forest fires.
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.