We continue to depend overwhelmingly on resources that are neither clean nor renewable. Fossil fuels- coal, oil, and natural gas- provide 85 percent of the United States’ energy needs. The combustion of these fuels generates massive amounts of air pollution, which effects our health and contributes to climate change. Electricity production is the greatest single source of air pollution in America. Power plants are responsible for a full two thirds of total sulfur dioxide emissions and one third of all nitrogen oxides and carbon dioxide emissions. Vehicles spout out another third of all nitrogen oxides, volatile organic compounds, and carbon dioxide, as well as fifty percent of all carbon monoxide emitted in America.