Acid Deposition, Smelter Emissions, and the Linearity Issue in the Western United States

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Science  30 Aug 1985:
Vol. 229, Issue 4716, pp. 859-862
DOI: 10.1126/science.229.4716.859


The variation in sulfur dioxide emissions from nonferrous metal smelters in the western United States over a 4-year period is compared with the variation in sulfate concentrations in precipitation in the Rocky Mountain states. The data support a linear relation between emissions and sulfate concentration. The geographic separation of emissions sources and precipitation monitors indicates a sulfur transport scale exceeding 1000 kilometers.