Read here and here and here. The Waxman-Markey "benefits" and the costs - click to enlarge.
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Update: Will Waxman-Markey create the added benefit of new renewable energy resources? EPA says 'No.' -- "President Obama says the greenhouse-gas emissions cutting Waxman-Markey bill before Congress will “spark a clean energy transformation.” But a new analysis by the Environmental Protection Agency casts doubt on that claim."