Clark County, Washington, 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 Clark County, Washington, and

Columbia County, Washington, give the percentage contributions from specific air pollution sources.  The Clark County Seat is Vancouver, Washington, and the Columbia County Seat is Dayton, Washington.