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Global Warming Debate Heats Up at UN

Scientists reveal visual proof humans most likely to blame for climate change.
02:24 | 09/27/2013

Transcript for Global Warming Debate Heats Up at UN

top scientists at the united nations say they want you to look at the pictures they have been studying, planet earth, the air, the water, the soil. Hundreds of scientists saying tonight, it is visual... See More
This transcript has been automatically generated and may not be 100% accurate.
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