| http://www.w3.org/ns/prov#value | - to switch to green power.The campaign to get more energy from renewable sources has moved to the U.S. energy grid, part of a broader effort aimed at weaning the nation off fossil fuels.A bill about to be introduced in the Senate would push utilities to generate drastically more of their power -- 15%, compared with the current 2% -- from sources such as wind or the sun by 2020.
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