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The Dangers of Greenhouse Gases

Government Report shows the future impact of global warming across America.
02:06 | 11/20/2011

Transcript for The Dangers of Greenhouse Gases

A pair of storm systems brought high winds and heavy rain to parts of the midwest early today. Spawning at least two tornadoes. Tens of thousands are without power and there are new fears of flooding... See More
This transcript has been automatically generated and may not be 100% accurate.
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