Speech people are always interesting and Ray Kurzweil is no different.  The founder of one of the first commercial speech recognition companies, the guy who thinks the Singularity will happen in 2047, is never at loss for optimistic views of the future, so what does he think about Global Warming?  He's quoted in this week's Fortune magazine (available online on CNN Money) :
"These slides that Gore puts up are ludicrous," says [Kurzweil]. "They don't account for anything like the technological progress we're going to experience."
He's right-on with his criticism of people who draw conclusions based on simple trendlines that assume technology will stay the same.  It won't.