Data on annual emissions of Carbon Dioxide (CO2), Sulfur Dioxide (SO2), and Nitrogen Oxides (NOx). Data organized by type of electric power producer, by energy source, and by U.S. state. Annual time series extend back to 1990. Based on Form EIA-861 data. Electric Power Producer: Commercial Cogen, Commercial Non-Cogen, Electric Utility, Industrial Cogen, Industrial Non-Cogen, IPP NAICS-22 Cogen, IPP NAICS-22 Non-Cogen, and Total Electric Power Industry Energy Source: Coal, Geothermal, Natural Gas, Other, Other Biomass, Other Gases, Wood and Wood Derived Fuels, Petroleum, and All Energy Sources