The Secret's out about Pahala's biofuel plant

[Bullwinkle]

Solar heating heating water to steam to turn turbines is how the big energy plants do it

steam was replaced by internal (rather than external) combustion, because steam boilers had a tendency to explode when the safety (over pressure) valve fails - shrapnel for all my friends - grin

http://en.wikipedia.org/wiki/Solar_thermal_energy

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