The full cost of alternatives to coal

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One of the things mentioned early in this thread is the issue of solar being subject to time of day and weather. Some of the larger , older solar power farms ( "Solar 2" http://en.wikipedia.org/wiki/Solar_Energy_Generating_Systems in the ca. desert)use trough thermal collectors ( heats oil, that makes steam for a steam turbine generator) , these plants bring on gas fired boilers as needed so output is reliable 24/7. Lifecycle cost is still quite high , lots of machinery and labor in comparison to kw output. Plants are much smaller than central station power plants. "Solar 2" is still in operation.
 
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Thanks to Samclem for starting a very interesting discussion. And thanks to all those who managed to keep their eyes on the prize. Let's just leave it here.
 

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