| http://www.w3.org/ns/prov#value | - Nearly 90 percent of reductions, says the group, ???were caused by decline in petroleum use??? and the ???displacement of coal??? by ???non-price factors??? rather than shale, and coal???s ???replacement by wind, hydro, and other renewables.??? To make matters worse, where natural gas saved 50 million tons of carbon by substituting coal generation due its lower price, it generated 66 million addit
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