| http://www.w3.org/ns/prov#value | - Instead, one of the six scenarios considered was a ???federal renewable portfolio standard for electricity which mandates that 20% by 2020, 30% by 2030, 40% by 2040, and 50% by 2050 has to be produced from renewable energy (including hydropower), and that all new coal power plants capture and store more than 90% of their CO2 emissions.??? Another was a federal fuel economy policy that established
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