The 13-floor, 415,000 sf La Jolla Commons II office tower in San Diego will be the largest building in the U.S. built to the net-zero standard upon completion in 2014, according to real estate firm Hines. Energy will be generated from directed biogas and onsite fuel cells. Bloom Energy's cells will generate a projected 5 million kilowatts of electricity annually, equivalent to about 1,000 homes. The fuel cells will convert methane to electricity, tapping methane in landfills and wastewater plants.
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