What is a desert?

Deserts occupy about one third of the entire land area. Deserts are formed where there is not enough water to maintain a rich vegetation. In Africa, it is the Sahara desert, Namib and Kalahari, in Chile - Atacama, and in North America - Sonoram. The great deserts are in Central Asia and Australia. Antarctica is also sometimes referred to as a desert. There is very dry, and water exists only in the form of ice.

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