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How to talk to an OSTRICH: "IT'S US"

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Published on Apr 25, 2012

Richard Alley address a common argument about climate change: that increasing amounts of carbon dioxide, CO2, are coming from natural sources, like volcanoes. He explains how analysis of the carbon atoms in the CO2 shows that they are the type that comes from burning fossil fuels. Therefore, the only possible explanation can be... "It's Us."

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