While I certainly prefer solar over nuclear energy or fossil fuel, I don't like the mandatory aspect of this move by the city of San Francisco.

San Francisco passes mandatory solar regulation for new buildings
Mary Greeley
Apr 21, 2016
http://marygreeley.com/?page_id=25808

[snip]

April 21, 2016 – California long know for the first in starting trends that later cross the nation, has once again taken authoritarian dictatorship to a new level.

San Francisco builders of all commercial or residential structures with 10 or fewer stories must now include solar panels, CIO reported.

San Francisco Board of Supervisors officials said they unanimously passed the Better Roofs regulation to “fight climate change and reduce reliance on fossil fuels.”

The San Francisco law is in line with California’s energy standards, which mandate that 15% of the roofs atop new “small and midsized” structures, also 10 stories or less, be ready for solar.

Supervisor Scott Wiener said in a statement that the law is a way to turn unused roof space into a partner of the city’s sustainable and renewable energy policies. San Francisco is no stranger to progressive energy policies, and a spokesman for the U.S. Energy Information Administration told CIO that the agency had not heard of any other municipalities enacting such a requirement.