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matkas - NCERT
You already know that three-fourth of theearth s surface is covered with water , but onlya small proportion of it accounts forfreshwater that can be put to use. Thisfreshwater is mainly obtained from surfacerun off and ground water that is continuallybeing renewed and recharged through thehydrological cycle. All water moves within thehydrological cycle ensuring that water is arenewable might wonder that if three-fourth ofthe world is covered with water and water isa renewable resource, then how is it thatcountries and regions around the globe sufferfrom water scarcity ? Why is it predicted thatby 2025, nearly two billion people will live inabsolute water scarcity ? water scarcity AND THE NEED FOR WATERCONSERVATION AND MANAGEMENTG iven the abundance and renewability ofwater, it is difficult to imagine that we maysuffer from water scarcity .
agriculture through developing drought resistant crops and dry farming techniques. You may have seen in many television advertisements that most farmers have their Fig. 3.1: Water Scarcity most cases is caused by over-exploitation, excessive use and unequal access to water among different social groups. Where is then water scarcity likely to occur?
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