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Given that the focus group sessions took place in three metropolitan centres (Montreal, Toronto and Vancouver), it was not surprising that focus group participants also put a very heavy emphasis on vehicle emissions and industry when they discussed the major sources of air pollution in their communities. It was clear from the focus group discussions that participants felt than man-made causes of air pollution are much more problematic than natural causes. However, it was interesting to see that a few residents of Vancouver and Montreal did identify methane from animals as a major source of air pollution (usually in the outlying areas). Meanwhile, Montreal participants were more apt to suggest that a large part of the pollution in Canada comes from the United States.
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