The roof paint solution to global warming?

AFP:

US Energy Secretary Steven Chu said Tuesday the Obama administration wanted to paint roofs an energy-reflecting white, as he took part in a climate change symposium in London.

The Nobel laureate in physics called for a "new revolution" in energy generation to cut greenhouse gas emissions.

But he warned there was no silver bullet for tackling climate change, and said a range of measures should be introduced, including painting flat roofs white.

Making roads and roofs a paler colour could have the equivalent effect of taking every car in the world off the road for 11 years, Chu said.

It was a geo-engineering scheme that was "completely benign" and would keep buildings cooler and reduce energy use from air conditioning, as well as reflecting sunlight back away from the Earth.

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This certainly seems like a more benign solution than cap and trade tax schemes. I put a white metal roof on my house when I built it over ten years ago and along with super insulation--R-40 walls and R-60 in the ceiling the house is remarkable efficient. My electric bills rarely exceed $200. I probably need to wash the inevitable black stains off now.