Ecowatch - According to the San Francisco Examiner, starting Jan. 1 of next year, new commercial and residential buildings up to 10 stories high must install rooftop solar systems for heat or electricity. Buildings that are taller are exempt for now.
The famously green metropolis is now the first major city in the U.S. to legislate such a requirement. San Francisco follows the footsteps of the smaller towns of Lancaster and Sebastopol. The municipalities, which are also in California, passed similar mandates in 2013.
“This legislation will help mov
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