Bill Gates on 'innovating to zero' carbon emissions

In a speech at TED 2010, Microsoft founder Bill Gates says the world's economic future hangs in the energy balance -- and a changing climate could induce planetary catastrophe.

Gates says the goal should be zero  -- yes, zero -- global carbon emissions by 2050.

Here's his argument, and his explanation for why he's backing a new type of nuclear reactor:

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This post was originally published on Smartplanet.com