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Figure 7-15 Indexes of Key Air Pollutant Emissions from U.S. Transportation: 1990-2014

Wednesday, February 22, 2017

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Figure 7-15 Indexes of Key Air Pollutant Emissions from   U.S. Transportation: 1990-2014

SOURCE: U.S. Environmental Protection Agency, National Emissions Inventory Air Pollutant Emissions Trends Data, 1970-2014, Average Annual Emissions All Criteria Pollutants, Available at https://www.epa.gov/air-emissions-inventories/air-pollutant-emissions-trends-data as of April 2016.