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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
Report
Data Center Threats in Louisiana
A more affordable, more reliable energy future for Louisiana is possible.
Video
The Case Against ExxonMobil, Chevron, and other Fossil Fuel Companies
Across the world, fossil fuel companies face a wave of new lawsuits for their role in the climate crisis.
Feature
UCS vs Anti-Science Actions
We're suing the Trump administration on a wide range of issues—and winning.
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.