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Now Playing: 04-19-12 Marketplace Tech Report

We've all heard about cloud computing being the wave of the future, but Greenpeace says some companies running cloud services are doing better than others from an environmental stewardship point of view. It has issued a report card on energy and gives Amazon and Apple Fs. Google achieved higher scores for its use of renewable energy sources. The facilities that house cloud computing use a lot of energy, and dropping the coal to plug in something else is much easier said than done. Plus, a look at a new PC game, the highly bleak "Legend of Grimrock."