The central parts of the three northern territories are covered by the tundra.
Canada, in general can be easily divided by the biomes that cover its territory, by simply saying that the southern half of the country is covered by the taiga, and the northern half is covered by the tundra.
The three northern territories are Yukon Territory, Northwest Territories, and Nunavut. All of those are in close proximity to the Arctic, and the climate there is very cold for most of the year, with snow and ice dominating the landscape, and having only a very short fresh, relatively cold summer.
Environmental protection is the third pillar and to many, the primary concern of the future of humanity. It defines how we should study and protect ecosystems, air quality, integrity and sustainability of our resources and focusing on the elements that place stress on the environment
The answer to the question is the total surface area increases and chemical composition changes. Consider the breakdown of rock into smaller pieces, these fragments vary from huge rocks to smaller sizes. As they are so crushed and broken they tend to occupy much of the surface area than when its just a huge rock.
Very acuratley, once the rate of birth, mortality rate, and infant mortality rate are taken into perspective.