San Francisco just became the first big US city to require solar panels on new buildings

Solar system installer Thomas Bywater adjusts new solar panels on the roof of a house in Sydney, August 19, 2009. San Francisco may be known for its fog, but the city wants to turn the sunny days it does get into power for its buildings. The San Francisco Board of Supervisors on Tuesday unanimously passed legislation that would require new construction that is shorter than 10 floors to install solar panels or solar water heaters on top of both new residential and commercial buildings.

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