Simply put, consumption of natural gas, wind, and solar is rising strongly, while coal and oil usage drops significantly. http://www.eia.gov/totalenergy/data/monthly/pdf/sec1_7.pdf. The shrinking energy pie is intensifying competition between fuels for market share.
One result of the shift to gas, wind, and solar and from coal and oil is sharply falling carbon emissions and sharply declining sulfur dioxide, nitrogen oxide, mercury, soot, and other air pollutants. America's air has not been cleaner in decades!