1/5/2009

Roofs and streets paved with reflective materials could offset carbon dioxide emissions by 44 billion metric tons, according to researchers at the Lawrence Berkeley National Laboratory. Researchers note that "cool roofing" materials of paints and coatings were developed by the roofing industry in the 1990s. Cool roofing costs up to 20% more than conventional roofing but can reduce air conditioning energy use by up to 30%.

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