![Rachel Cleetus speaks with reporters at COP](http://5cj.replaceyourjob.net/sites/default/files/styles/thumbnail/public/2023-12/rachel-cleetus-UAE-COP_0.jpg?itok=Pa08yJGx)
Sanjali De Silva/UCS
Science in service of people and the planet.
Our work
Report
![Proximity of power stations to EJ neighborhoods.](/sites/default/files/styles/thumbnail/public/2024-03/generators-proximity-thumbnail.jpg?itok=AXSEWFRp)
Siting for a Cleaner, More Equitable Grid in Massachusetts
Deciding where new energy infrastructure is built is a crucial consideration for the clean energy transition.
Video
![Historic Air Force video still with nuclear missiles](/sites/default/files/styles/thumbnail/public/2022-01/sole-authority-video-still.jpg?itok=2Ktow2_-)
Ending Sole Authority
In the United States, the sole authority to order the use of nuclear weapons belongs to the president.
Explainer
![Sunrise over Bloomingdale](/sites/default/files/styles/thumbnail/public/2020-10/JonathanKrizFLICKR.jpg?itok=MPoC311G)
What Is Solar Geoengineering?
Solar geoengineering technologies cool the earth by reflecting sunlight back into space—but they pose many risks, challenges, and uncertainties.
Activist Resource
![Person taking notes during a meeting.](/sites/default/files/styles/thumbnail/public/2024-01/1500-900-town-hall-notes.jpg?itok=hKTZNZJf)
Questions for Candidates 2024
We must push candidates to fight for science, justice, and progress.