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Why is Al Gore
optimistic about
climate change? In
this spirited
talk, Gore asks
three powerful
questions about
the man-made
forces threatening
to des
(more)
Why is Al Gore optimistic about climate change? In this spirited talk, Gore asks three powerful questions about the man-made forces threatening to destroy our planet -- and the solutions we're designing to combat them. (Featuring Q&A with TED Curator Chris Anderson)