Center for American Progress - Is global warming a problem primarily caused by humans?

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Center for American Progress Global warming is a problem primarily caused by humans; higher average temperatures are partly or entirely the result of human actions. "Natural Causes Cannot Explain Warmth Over Last 400 Years"

Evidence approved (1/24/2007 9:58:55 AM)

"Natural Causes Cannot Explain Warmth Over Last 400 Years"

Think Progress

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FACT — BUSH STILL DENIES FUNDAMENTAL CLIMATE SCIENCE: Last February, President Bush claimed there is still “a debate over whether [global warming] is man-made or naturally caused.” There is no real scientific debate over this question. Most recently, the National Academy of Sciences has unequivocally stated that natural causes cannot explain the unprecedented warmth over the last 400 years. Rather, “human activities are responsible for much of the recent warming,” the report states. [ThinkProgress; National Academies Press]

Posted by Think Progress January 23, 2007