Green Technologies: Vinod Khosla's Ideas
"A Prius might save you, depending on your calculations, a half a ton to 2 tons of carbon a year," Khosla said, referring to the battery-and-gasoline-powered Toyota car. But, he added, "Just painting your [home's] roof white saves you 10 tons of CO2. That's good economics. Instead of spending $5,000 extra for that Prius, you could spend a few hundred dollars to replace the light bulbs in your house with more efficient ones and save a lot more carbon." He presented data showing that while the all-electric-powered GM Volt, expected to be sold starting in 2010, would emit 144 grams of carbon dioxide per mile, it would also cost a hefty $623 a month to drive, and much of the electricity required to power the car would be created by burning coal. SEE FULL STORY HERE
SUMMER RHODES
RIPTIDE SCIENCE CORRESPONDENT

The painting roofs white idea must be aimed at an audience in hotter climes with air conditioning. I don't even know of anybody with air conditioning in the back of San Pedro Valley, our warmest spot. Each location and each individual needs to give these issues thought and research.
Posted by: Dan Underhill | November 21, 2008 at 08:20 PM