Carlos Barria/Reuters
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
Press Release
Supreme Court Significantly Reduces EPA’s Ability to Fight Carbon Pollution from Power Plants
"It defies logic and defies common sense."
Report
On the Road to 100 Percent Renewables
States can reliably meet 100 percent of their electricity needs with renewable energy.
Blog series
Danger Season
As the climate crisis worsens, the months of May through October are becoming "Danger Season."
Explainer
Water, Wildfire, and Climate Change
Fires across the West, and particularly in California, are threatening the availability and quality of water for millions of people.
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.