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Climate campaigners are comparing global warming with nuclear devastation. And here's why dropping the H-bomb in polite conversation is a bright idea.

Here are the three main methods that would likely be used to eliminate Syria's chemical weapons arsenal, if the Assad regime follows through on its announced desire to join the Chemical Weapons Convention.

The idea that intervention will make America safer is wrong-headed.

Chemical weapons and national security experts assess the situation in Syria and suggest ways in which the United States and the international community might proceed, in light of what would—if proven true—be the most extensive use of chemical weapons in the Syrian uprising.

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

Will cities take the necessary steps to avoid, withstand, and recover from climate change’s worst effects? The survival and economic well-being of millions depends on that.

Why climate change and nuclear weapons both belong on the Doomsday Clock.