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14 green prisons

By: Andrew Schenkel on Oct. 25, 2010, 11:05 a.m.

Photo: pshab/flickr

12 of 16

Santa Rita Jail in Dublin, Calif.

The rooftops of the enormous Santa Rita Jail are covered with one of the nation’s largest solar-electric systems. About 1.2 megawatts of electricity are pumped back onto the grid when the solar-electric system is combined with fuel cell technology — providing electricity to an energy-starved part of northern California. explains how the jail’s solar-electric system is paying off by relieving electric stress on Alameda County during peak usage times.