Science, Tech & Environment

Off the Debate Agenda: The Unmentionable Threat of Global Warming

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Barack Obama and Mitt Romney during the final presidential debate in Boca Raton, Florida. (Photo: Kevin Lamarque/REUTERS)

Climate change is arguably one of the biggest threats to US and global security, but there wasn't a word about it in last night's presidential debate on foreign policy.

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Anchor Marco Werman talks to journalist Mark Hertsgaard about why climate change has disappeared from the election conversation and what that says about the ability of our political system to seriously engage with the reality of global warming.

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