A) Construction of dams
B) water pollution
C) industrial effluents
D) all the above
Correct Answer: D
Solution :
Ganga has been altered by the construction of more than 50 dams and other irrigation-related projects, with severe consequences for the river dolphins. The population of the Ganges River Dolphin has declined to less than 1,800 from 6,000 in 1982 due to construction of dams and water pollution caused by pesticides, fertilizers, and industrial effluents.
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