Are solar photovoltaics just too costly?

First, biofuels were dealt a body blow. A pair of recent studies pointed out that practically any crop -– whether corn, sugar, or oil bearing plants -– grown on newly cleared lands created such a deep carbon deficit that it could take decades or centuries for biofuels generated from those acres to start benefiting the environment. Then this week, a study harshly critical of the cost-effectiveness of solar photovoltaic (PV) energy has put a scare into the industry.

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