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Despite what the public thinks, climate scientists are nearly in agreement that human activity is changing Earth’s climate. 

Complacency and entrenched interests keep the weapons industrial complex in place.

Crowd-sourcing information on nuclear compliance carries risks as well as rewards.

Holding another Nuclear Security Summit is a good idea, but leaders must go further.

If you’re thinking about energy savings only from the moment you buy a machine, you’re missing half the picture. 

Is the United States part of the problem or part of the solution in ending the standoff over Iran’s nuclear program?

Concerns about Russian treaty compliance are no argument against further arms. 

After nuclear accidents, radioactive contamination migrates from forests into soil. Officials at Fukushima and Chernobyl have taken completely different approaches to decontamination.

Dave Lochbaum, director of the Nuclear Safety Project at the Union of Concerned Scientists, explains how nuclear plants are decommissioned in the United States.