Are white roofs mandatory in any cities?



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    White roofs are the next wave of lowering carbon emissions.  The white coloring of the roof reflects sunlight away from the building.  By doing so it is estimated the building uses 20% less energy.  On trials, the first coat of white paint gave a 45 degree difference.  Arizona uses a mandatory white roof / cool roof system for state and state-funded buildings.  Toronto uses a mandatory green roof, while Philadelphia and New York are currently working on cool roof (both white and green) initiatives.

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