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70% percent of Australia is desert/semi-arid.

About 45% of the Australian continent is sand dunes.

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Around 40-45 percent of Australia is covered by deserts...

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Antartica The world's wettest and driest desert in the world. Wet because it is covered in 98 percent ice. how Awesome::)

Deserts comprise 1.3 million square miles or about 44% of the land area of Australia