The shift occurred as the cost of wind power and other renewable energy is rapidly declining and coal is being pushed out by natural gas. The shift occurred as the cost of wind power and other renewable energy is rapidly declining and coal is being pushed out by natural gas. Wind Power, Coal, Energy and Power, United States, Electric Light and Power, Alternative and Renewable Energy, Regulation and Deregulation of Industry, Global Warming, Greenhouse Gas Emissions, Natural Gas, Solar Energy, Nuclear Energy, United States Economy NYT > Science