EDITORIAL The way the San Francisco Chronicle describes it, the city's new green power program "won't come cheap." That's a line that Pacific Gas and Electric Co. will use over and over again in the next few months as the city finally prepares to get into the retail electricity business, 98 years after Congress mandated public power for San Francisco. Clean Power SF will offer 100 percent clean energy — and yes, right now, this spring, it will cost a little bit more than buying nuclear and coal power from PG&E.Read more »