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The Weight of the Evidence

How We Know the Planet Is Warming

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Cooler Smarter

Abstract

You have undoubtedly heard a good deal about global warming. But if you’re like most Americans, you feel somewhat confused about the topic. According to a national survey in 2010, only one in every 10 Americans feels very well informed about the causes of global warming and how Earth’s climate system works. In other words, 90 percent of us consider ourselves a little shaky on the particulars.

It is fair to say that global warming may be the most carefully and fully studied topic in human history.

—Ralph Cicerone, president of the National Academy of Sciences

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© 2012 The Union of Concerned Scientists

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Shulman, S. et al. (2012). The Weight of the Evidence. In: Cooler Smarter. Island Press/Center for Resource Economics. https://doi.org/10.5822/978-1-61091-234-1_3

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