Estimated total SO2 emissions in Canada in year 2000 were 2,352,187 tonnes (without open sources e.g. forest fires, prescribed burning). The primary emitting sources are:

• base metal smelters
• fossil-fueled electric power plants
• upstream oil and gas industry (e.g. natural gas plants, oil sands)
• other industrial sources (e.g. cement plants, petroleum refineries, pulp and paper mills)
• transportation sources (e.g. ships, off-road diesel vehicles)

SOx Emissions - Year 2000
(Without Open Sources - % of Total)