| http://www.w3.org/ns/prov#value | - Environmental groups want the plant shut down over fears that it is a source of haze at the Grand Canyon.The new report from the National Renewable Energy Lab (NREL) concludes that it is inconclusive as to whether removing approximately two-thirds of the current NOx emissions from Navajo GS would lead to any perceptible improvement in visibility at the Grand Canyon and other areas of concern.The
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