Abstract

This review describes efforts underway in Canada to investigate large-scale atmospheric sulfur pollution. An assessment of the susceptibility of various parts of the country, in terms of receptor sensitivity, meteorological regime, and source–receptor configuration, as well as evidence of ecosystem damage in North America and Europe, has led the federal Department of Fisheries and Environment to undertake a comprehensive program to investigate the long-range transport of air pollutants in eastern Canada. The program includes studies of emissions, atmospheric phenomena, and aquatic and terrestrial ecosystem effects. Atmospheric aspects of particular interest include long-range transport, regional particulate-sulfate levels, and the acidity and sulfate content of precipitation.

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