Skip to Navigation
Skip to Content

Support PSR!

Make a difference in the challenge to confront global warming and prevent nuclear war and the development and use of nuclear weapons.

Donate Now »

Take Action

When natural gas and oil are extracted, methane -- a potent greenhouse gas -- leaks into the atmosphere from the wells, compressors, pipes and other infrastructure. Tell EPA to regulate methane now!

An Assessment of the Extent of Projected Global Famine Resulting From Limited, Regional Nuclear War

The recent study by Robock et al on the climatic consequences of regional nuclear war shows that even a “limited” nuclear conflict, involving as few as 100 Hiroshima-sized bombs, would have global implications with significant cooling of the earth's surface and decreased precipitation in many parts of the world. Even a modest, sudden decline in agricultural production could trigger significant increases in the prices for basic foods and hoarding on a global scale, both of which would make food inaccessible to poor people in much of the world.


Browse Resources

Action Alerts

More action alerts»


More »


  • Dr. Ira Helfand Speaks at the UN

    Dr. Ira Helfand spoke before the Untied Nations General Assembly on September 10, 2015 as part of a panel addressing the pursuit of a nuclear weapons free world. Read more »

  • Video: We Have an Iran Deal! Now What?

    Watch PSR Security Program's latest webinar to understand the details of the Iran Deal and what you can do to keep the deal safe from Congress. Featuring speaker Kelsey Davenport, Arms Control Association. Read more »

  • Nukes in Your Backyard

    Ever wonder how many nuclear mishaps and facilities are in your own backyard? Then check out our new map featuring pinpoint locations of close calls and the stories behind them. Read more »

In the Spotlight

  • September 19, 2015
    Nukebusters Short Film Awards
    The votes are in! Five hundred people and three celebrity judges chose the best films on nuclear weapons.