question_answer

Give main arguments against the large dams. Discuss how can it be ensured that the large dams do not threaten the environment.

Answer:

Main arguments against the large dams:

(a) (i)  Construction of large dams leads to sub-mergence of fertile land. suitable for agriculture is sub-merged.

(ii) People are displaced from their natural surroundings.

(iii) Loss of valuable forests and wildlife.

(iv) Some tribes living in the forest regions lose their precious heritage.

(v) Construction of a large dam across a river to regulate water supply results in serious consequences to environment. Dams also affect the movement of fish and other organisms in the river.

(vi) The construction of a dam results in impounding water in a large reservoir in which silt carried by the river gets deposited. Large-scale sedimentation may cause floods.

(vi) Dam across a river reduces deposition of silt containing valuable nutrients, reducing soil fertility.

(b) (i) While constructing large dams, environmental safeguards must be ensured.

(ii) Assessments should be made regarding the benefits and the environmental hazards.