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Science for 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
Keeping Everyone's Lights On
The grid today is woefully unprepared to meet our current climate reality.
Activist Resource
Congressional Budget Reconciliation
This year’s Congressional budget reconciliation package could fundamentally reshape federal spending and undo years of climate progress.
Report
Decades of Deceit
Why the case against the major fossil fuel companies for fraud and climate damages is so strong.
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
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Nuclear Security Agency Responds To UCS Scientist's Concerns
After a UCS scientist co-authored an article on the potential for a certain kind of in demand uranium fuel to be used to make nuclear weapons, US nuclear security agency NNSA agreed to sponsor a study on this risk.