Iceland as a whole has of course tapped this geo-thermal on a much grander scale.

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Because PV is easier to finance than concentrating solar thermal, a few utility-scale projects in the southwest U.S. have shifted over to PV.

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Now on the scale of the next century, the projections are suggesting that, between the ice and thermal expansion of the ocean, that we're likely to see upwards of a meter of sea level rise.

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Utility-scale concentrating solar power (CSP) systems that produce electricity using lenses or mirrors to focus radiation on thermal collectors or photovoltaic cells draw criticism from environmental groups for taking up too much desert land, thus displacing certain animal and reptile species.

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