"! geography, need ! "
why do most of canada's people live in southern ontario and quebec?

Canada's weather is mostly cold. Less people live in the colder areas such as, Yukon/Northwest Territories/Nunavut. Meaning that the majority lives in Quebec, Ontario, or British Columbia

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”