Answers

2015-07-22T22:13:12+05:30
The no.of species will be adversely affected. The dam acts as a barrier not allowing any fishes to cross the river. Fishes can't move upstream and their no.decreases. The towns,forests in that area will be demolished. Low temperatures and dissolved water content gradient is other consequence
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2015-07-23T06:52:37+05:30

dams having following disadvantages :-
  - it became the cause earth quake 
  - it became the cause of water born disease 
  - it creates inter state dispute 
  - it poses the challenge of migration 
  - it also effects the ecosystem 
  - also cause deforestation and flood ( if dam get damaged or busted ) .
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