tempestades que atravessam o mundo

ADVANCING DESERTS – From Chapter 5. Natural Systems Under Stress
Lester R. Brown, Plan B 2.0: Rescuing a Planet Under Stress and a Civilization in Trouble

On April 18, 2001, the western United States—from the Arizona border north to Canada—was blanketed with dust. It came from a huge dust storm that originated in northwestern China and Mongolia on April 5. Measuring 1,800 kilometers across when it left China, the storm carried millions of tons of topsoil, a vital resource that will take centuries to replace through natural processes

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