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"In one of the boldest renewable energy standards set thus far, Colorado's governor Bill Ritter has signed into law a bill requiring 30% of the state's energy mix come from renewable sources by 2020. Which means, in the"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/colorado-powered-by-30-renewable-energy-by-2020.html>