We Must Prevent

What We Cannot Cure

Guided by the values and expertise of medicine and public health, we work to protect human life from the gravest threats to health and survival.

Recent News

Is ‘Small Nuclear Power’ the Answer to Arizona’s Growing Need for Electricity?

The Arizona Corporation Commission wants you to join the conversation at a workshop February 24 on how advanced nuclear technology might help satisfy the state’s hunger for power.

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PSR Lawsuit in the Works Over Trump’s EPA

Greenhouse Gas Is No Longer a Concern, Trump Assures. Says PSR: “We’ll See You in Court”

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4 Seconds to Doomsday. Not Very Comforting.

The 2026 Doomsday Clock is now reading 85 seconds to midnight, four seconds closer than last year’s record of 89 seconds. And, today is Downwinder Day.

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Tick-Tock, the Doomsday Clock Speaks

Tomorrow at 8 a.m. (MST), the Bulletin of the Atomic Scientists will reveal the time on the dial of the 2026 Doomsday Clock live on the Bulletin‘s YouTube channel.

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Welcome to PSR Arizona

Currently we focus our efforts on nuclear weapons treaties, climate change action, and promotion of renewable energies, especially solar energy. We collaborate with a number of other peace and environmental organizations in our communities.

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