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The Importance Of Regional Air Quality In Ontario

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Regional air quality is considerably impacted by flow of air pollutants from long distances; originating from Asia can impact air quality in North America. Pollutants originating from United States are believed to be responsible for high ozone levels in southwestern Ontario. During smog episodes in Ontario, these trans-boundary pollutants can be responsible for almost 90 percent of the ozone in areas like Port Huron and Simcoe (North Lake Erie), Parry Sound (East Lake Huron and Georgian Bay) and Windsor (extreme southwest). To a small extent pollutants originating from Ontario impact air quality in Quebec, Maritime provinces and U.S New England states.

The Province of Ontario is not only the recipient of transboundary air pollution, but contributes

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