Question

give reasons. environmental aspects must be careful looked into before construction of dam in hilly areas.

Answer 1

Explanation:

Construction of a huge dam creates large scale destruction of natural vegetation and wildlife in those areas which get submerged. This is not good for the ecosystem. Hence, environmental aspects must be carefully looked into before building huge dams.

Answer 2

The construction of huge dams in hilly areas causes the destruction of vegetations and wildlife in lower areas and even lead to wildlife down hill to migrate in search of food.  Because the dam constructed in hilly areas will cut off water supply down hill to the vegetations and wildlife.