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Estimated National Emissions of Particulate Matter (PM-2.5)
Details may not add up to totals due to rounding in the source.
KEY: R = revised.
a Particulate matter less than 2.5 microns in size. Data include PM without condensable.
b Industrial processes consists of chemical and allied product manufacturing, metals processing, petroleum and related industries, and other industrial processes; solvent utilization; and storage and transportation.
U.S. Environmental Protection Agency, Air Emissions Inventories, Air Pollutant Emissions Trends Data, available at https://www.epa.gov/air-emissions-inventories/air-pollutant-emissions-tr... as of Mar. 3, 2017.