Dust storms are an increasingly common problem in the world as arid conditions leave behind mounds of dry, loose soil. As climate change and water shortages work in tandem, some experts wonder if we've set ourselves up for a 21st-century Dust Bowl. Pictured here is a monster dust storm engulfing Phoenix, Ariz., on July 31, 2011. From mother nature network

Dust storms have been raging across southwestern Asia and the Middle East in mid-March 2012. Intense dust events spanned thousands of kilometers from the Red Sea to Afgashistan, and from the Arabian Peninsula to India. Earlier in the month, dust was on the move in Iraq and Syria and along Africa’s Atlantic and Mediterranean coasts.

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