Carbon monoxide: main emission sources

Estimated total CO emissions in Canada in year 2010 were 8,717 kilotonnes (without open sources e.g. forest fires, prescribed burning). The primary emitting sources are:

• transportation sources (e.g. on-road and off-road motor vehicles and engines, marine, air)
• wood industry
• aluminum industry
• residential wood heating
• other industrial sources (e.g. aluminum)

Pie chart of CO emissions for 2010. 75 percent represents transportation, 8 percent residential fuel wood combustion, 5 percent upstream petroleum industry, 4 percent aluminum industry, 4 percent wood industry and 4 percent other sources.