S.1949: A bill to promote economically sound modernization of electric power generation capacity in the United States, to establish requirements to improve the combustion heat rate efficiency of fossil fuel-fired electric utility generating units, to reduce emissions of mercury, carbon dioxide, nitrogen oxides, and sulfur dioxide, to require that all fossil fuel-fired electric utility generating units operating in the United States meet new source review requirements, to promote the use of clean coal technologies, and to promote alternative energy and clean energy sources such as solar, wind, biomass, and fuel cells.