Michael Oppenheimer

Smoke pours from a chimney at a cement plant in Binzhou city, in eastern China's Shandong province. (AP Photo)

What 95% certainty of warming means to scientists

WASHINGTON (AP) — Top scientists from a variety of fields say they are about as certain that global warming is a real, man-made threat as they are that cigarettes kill. They are as sure about […]

09/24/2013

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