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Tell your senators and representative to support diplomacy with Iran. The more voices that are heard, the better the chances of this agreement taking effect smoothly. Everyone's voice matters!

Climate and Health Effects of Regional Nuclear War

Recent studies have shown that even a “limited” nuclear conflict, involving as few as 100 Hiroshima-sized bombs, would have global climate implications. Among the most serious consequences, a significant cooling of the earth's surface would curtail growing seasons for a decade or more, affecting the food security of billions of people far removed from the area of conflict. 

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Action Alerts

  • Tell Congress to Support Diplomacy with Iran

    Tell your senators and representative to support diplomacy with Iran. The more voices that are heard, the better the chances of this agreement taking effect smoothly. Everyone's voice matters!

  • A Big Win!

    Thank the President for sending a delegation to the Vienna Conference on the Humanitarian Impact of Nuclear Weapons this December.

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In the Spotlight

  • July 17, 2014
    Our Best Opportunity to Cut Climate Change
    We need you to take action now! Tell the EPA that its proposed rule to cut carbon pollution from power plants Is vitally important and on the right track – but can be strengthened.