Omari Spears/UCS
Science in service of people and the planet.
The Union of Concerned Scientists is a member-supported nonprofit that’s fighting for a safer and healthier world.
Our work
Feature
2025 Annual Report
Science won't be silenced.
Report
Power After the Storm
As climate change can exacerbate extreme events the need for science-based, proactive grid modernization is more pressing than ever.
Feature
2025 UCS Science Defenders
The 2025 UCS Science Defenders share a special commitment to leverage science to help their communities. We are so pleased to introduce them, and their great work.
Video
UCS: What We Do
Breathtaking imagery from photographer Daniel Beltrá showcases the range of issues that UCS works on.
How we work
Accomplishments
Trevor Tejeda-Gervais
Cleaner, More Affordable Power for Illinois
UCS championed legislation that will help Illinois achieve its clean electricity goals and boost energy affordability amid federal attacks on clean energy.