Fight Global Warming and White Roofs

A recent study found that there is a connection between global warming and white roofs.

A can of white paint should be part of the planet’s arsenal against global warming, say California researchers, who have calculated that installing white roofs in the world’s cities could offset 1.5 years of man-made carbon emissions. (source)

For related article in Bahasa Indonesia, please go to akuinginhijau.wordpres.com, a very informative blog about environment. Anyway, I painted my room green. Just curious, if I painted white, does it help to lower the room temperature? Please don’t suggest to get air conditioner. :)