Global Education Project EARTH
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Soil Erosion


Principal Causes of Soil Degradation "About 2 million hectares of rainfed and irrigated agricultural lands are lost to production every year due to severe land degradation, among other factors." [1] "It takes approximately 500 years to replace 25 millimeters (1 inch) of topsoil lost to...


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In 1996, 1.7 million hectares of bio-tech crops were planted in the world. How many hectares were planted in 2017?