General Motors, not exactly known for environmental cleanliness.. well.. they apparently have been making BIG investments in solar power. The current bit of news is a rooftop solar power plant they are planning to build onto the roof of a factory in Spain. It is a 10 megawatt installation and will apparently provide more power than required by the plant, because they intend to sell some power to the local power company. The installation will cover about 2,000,000 square feet of the rooftop. The plant assembles more than 480,000 vehicles per year.

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