Why Does Holland Have so Many Windmills?
The large number of windmills in Holland, or The Netherlands, is due to the fact that they were needed to pump water into the canals off the rich, low-lying land...
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Why Does the Sahara Change Shape?
The Sahara, the world’s greatest dry hot desert, stretches right across the north of Africa where there is almost no rainfall and, consequently, little or no vegetation...
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