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Estimated National Emissions of Carbon Monoxide
Details may not add up to totals due to rounding in the source.
KEY: R = revised.
a Industrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, other industrial processes; and solvent utilization, storage, and transport.
U.S. Environmental Protection Agency, Air Emissions Inventories, Air Pollutant Emissions Trends Data, available at as of Mar. 3, 2017.