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Global Warming

PBS NewsHour 2013-11-12

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PBS NewsHour 2013-09-27

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PBS NewsHour 2012-09-17

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PBS NewsHour 2012-02-20

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PBS NewsHour 2011-06-22

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PBS NewsHour 2011-06-20

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PBS NewsHour 2009-12-24

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NBC Nightly News With Brian Williams 2009-12-08

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NBC Nightly News 2009-12-04

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NBC Nightly News 2009-06-16

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