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Atmospheric carbon dioxide levels plunged by 40 percent before and during the formation of the Antarctic ice sheet 34 million years ago, according to a new study. The finding helps solve a long-standing scientific puzzle and confirms the power of C02 to dramatically alter global climate. The study is the first of its kind to show that C02 was tracking global cooling at that time. It confirms that significant falls in the greenhouse gas result in global cooling, just as rises result in global warming. [Source: ScienceDaily]
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