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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 series
Danger Season
As the climate crisis worsens, the months of May through October are becoming "Danger Season."
Report
Economics of Gas-Fired Power
Many fossil fuel power plants across the country are no longer economic to operate year-round.
Podcast
Reaching 100% Renewables by 2035
Community organizer Bridget Vial and energy analyst Paula Garcia discuss how some states can reach an equitable transition to 100% clean energy by 2035.
Video
Why Climate Resilience Is Like a Tiger Chase
Everyone knows we need to cut emissions. But we need to start adapting too.
How we work
Accomplishments
Created a Roadmap for Clean Trucking
After UCS worked with partners on analysis and testimony highlighting the problem of freight truck pollution, and the benefits of clean trucks, Massachusetts, New Jersey, and New York have adopted a set of rules to curb pollution from trucks.