Dams and particularly large dams, are required to meet the increasing demand for water, foodgrains, flood control, supply of power, particularly peaking power, and supply of carbon-free energy. However, there are apprehensions about the effects of hydel projects, especially large dams on ecology and society, and displacement of people. We need to balance current needs with long-term sustainable development. This article analyses the various options on the basis of data available.
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