Not being a techie or a VC, Mr. Khosla's names was unknown to me until a few weeks ago.
Now I see him in energyBIZ and Fast Company.

Background, founder of Sun Microsystems, big into the VC world and several years ago shifted his investing to green investments to address climate change. He sees climate change as a "technological opportunity" and suggests that "We need planet insurance, because the probability of a disaster is much higher."

He has invested in solar, carbon-negative concrete, bio-fuels and wind power storage - to name a few.

Check out his companies web site, the papers and presentations are particularly interesting: http://www.khoslaventures.com/.