Question

"Although large dams are useful yet they cause ecological problems".​

Answer 1

Answer:

Greenhouse gases: The flooding of surrounding habitat around dams kills trees and other plant life that then decomposes and releases large amounts of carbon into the atmosphere. Because the river is no longer flowing freely, the water becomes stagnant and the bottom of the reservoir becomes becomes depleted of oxygen.

Answer 2

Answer:

sry I don't know correct answer but I some about this topic