Johnston County, North Carolina, Air Pollution Sources B

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Abstract: The Environmental Protection Agency (EPA) compiles data on emission tonnages of air pollutants for US counties.  US Air Quality Gradebook ("AirGrades") source sheets such as this one for Johnston County, North Carolina, and

Jones County, North Carolina, give the percentage contributions from specific air pollution sources.  The Johnston County Seat is Smithfield, North Carolina, and the Jones County Seat is Trenton, North Carolina.