Comment: Re:Dumb title: CO2 is not "dirty" (Score 3, Informative) 260
The SEGS, a solar thermal plant in the Mojave Desert uses ground water from a rapidly depleting aquifer to run the condensers for their generating station. The NREL report about trough-based solar thermal energy lists the SEGS's water consumption as 1000 gallons (about 3.5 tonnes in real units) evaporated per MWh generated.
http://www.nrel.gov/csp/troughnet/faqs.html
Oceanside nuclear and other thermal power stations do not evaporate any water, they return seawater warmed by a few degrees from the condensers to the ocean.