Smart roofing that reflects heat in summer and absorbs in winter

[John Raabe]

And it's made from waste cooking oil from fast food resturants



http://www.sciencedaily.com/releases/2010/03/100321203506.htm

[MountainDon]

    what next?

I love the part where the developer, "cautions against pouring ordinary cooking oil on a roof in an attempt to achieve a similar energy-saving effect. That's because ordinary cooking oil won't turn into a polymer, doesn't contain the key ingredient for controlling infrared light levels, and could well pose a fire hazard for the building."    I guess it's necessary to be careful in case somebody skims the article a little too fast.