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Desertification: the invisible frontline
… - decrease in area 1963, 1973, 1987, 1997 and 2001 aral sea - decrease in area 1960, 1990, 2000, and 2010 the … network of canals and levees are depleting the aral sea water resources through infiltration and evaporation, … effective when they are part of a country-wide or regional-level effort to preserve and rehabilitate landscapes. …