GM Vice-Chairman doesn't 'believe' in CO2 theory

(at about 1:50 into the clip)

Last week, General Motors unvailed the Chevy Volt, gas-backup electric car. In the same week Bob Lutz, the Vice-Chairman of General Motors, recently appeared on 'The Colbert Report' and where he clearly stated:

I accept that planet is heated but I, like many noted scientists, don't believe in the CO2 theory.

And one wonders how GM manages to keep its standing as the world's most successful auto maker.