Photo: #Former Vice President Al Gore is also author of the book "The Assault on Reason." He travels the world to speak about global warming.

Aspen Ideas Festival

Fighting global warming

Broadcast: Midday, 08/09/2007, 12:00 p.m.

St. Paul, Minn. — Former Vice President Al Gore says global warming has become a "planetary emergency." He also says big energy companies are financing a campaign of misinformation to convince the public that scientists disagree about global warming. He discussed his concerns during a recent conversation with venture capitalist John Doerr at the Aspen Institute.

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