Cool roofs don't have to be white. Researchers are at work discovering new pigments with "cooling" capacities, according to this article. A case in point is the brilliant blue coating from Oregon State University researcher Mas Subramanian, which was made from manganese cooked with a combination of yttrium and indium oxides. "Given the right chemical properties, even dark pigments ... turn away much of the sun's heat," writes Michael Coren.
Blue coating material can help reduce heat on roofs
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