The Northwest Territories, Nunavut and Yukon contain one-third of Canada’s land mass but have a population of only 100,000. There are gold, lead, copper, diamond and zinc mines. Oil and gas deposits are being developed. The North is often referred to as the “Land of the Midnight Sun” because at the height of summer, daylight can last up to 24 hours. In winter, the sun disappears and darkness sets in for three months. The Northern territories have long cold winters and short cool summers. Much of the North is made up of tundra, the vast rocky Arctic plain. Because of the cold Arctic climate, there are no trees on the tundra and the soil is permanently frozen. Some continue to earn a living by hunting, fishing and trapping. Inuit art is sold throughout Canada and around the world.