14 of the 15 worst cities for air pollution in U.S. and Canada are north of the border: report
Air quality in Canada is now worse than in the U.S., according to the 6th Annual World Air Quality Report. Of the 15 most polluted cities in the two countries, 14 were in Canada.
Air quality in Canada is now worse than in the U.S., according to the 6th Annual World Air Quality Report. Of the 15 most polluted cities in the two countries, 14 were in Canada.
