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A public power group in Northern California is planning to polish up the clean/green creds of one of California's biggest renewable energy plants, The Geysers geothermal energy plant. The group will install a 1MW solar PV system that will provide power for the pumps used to replinish the water levels/pressure of the geothermal resource. It's a great example of closing the loop on clean energy production, one that we hope to see more of. Clean energy systems still require a lot of dirty energy: manufacturing, construction, maintenance, transportation, all play a roll in the development and operations of a clean energy system. Most of the energy that goes into this aspect of clean energy infrastructure comes from legacy energy sources. Will Nanosolar's manufacturing plant in San Jose be powered by Nanosolar thin-film on the roof? Unlikely. How will ethanol find its way to Iowa to the consumer? Most likely in trucks powered by petro-diesel. The energy challenges that we face are many layers deep. It occurs to me, though. Why was the Geysers plant buying electricity from PG&E to power the pumps; doesn't a geothermal energy plant produce.... electricity?
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