The following which would best categorize Canada's population is concentrated in the south. The three big cities are actually all within under a five-hour distance from the border of the United States (Montreal, Toronto and Vancouver). Cities in Canada are often concentrated in the southern part, because the further north you go, the colder it gets and the cold can often be quite brutal in Northern Canada.
The informal sector lacks land, capital, and technology, and can be less productive than formal enterprises, however, it can improve individual earnings and add money into the economy. It is the access to the market and power to purchase that can assist the productivity of the informal worker. If products can be sold on a cheaper mass scale to informal workers to use as a resource, this could help improve this sector to be more meaningful.
This is True because both saltwater and freshwater have natural carbon dioxide.