Why do we need to build large dams? List four reasons. What are their demerits?

 Dams are built for a number of reasons:

  • To control the flow of water so as to elinimate flooding.
  • To make electricity using hydroelectric power.
  • For navigation
  • For recreation
  • For preventing fire
  • To supply water


1.Social problems:Because it displaces large no.of peasants and tribes without adequate compensation or rehabilitation.

2.Economic problems:Because they swallow up huge amounts of public money without the generation of proportionate benefits.

3.Environment Problems:Because they contribute enormously deforestation and the loss of biological diversities.

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