why do some people, despite the economic increase it would generate, not want to buld more dams in India?

The area of the Himalayas that share India and China have a great seismic activity, with similar seismic activity, it is precisely where hundreds of dams are being built or are thought to erect them, the majority to supply hydroelectric power to India or China. A dam built on this hydraulic furor paid by the governments should, like any of the already finished, resist the strong shaking of the ground caused by an extreme earthquake, says Martin Wieland, of the International Commission of Large Dams, a group of engineers that makes recommendations relative to the structural standards. Although all nations have their own standards, India and China keep the design of their dams secret when they want to inspect it internationally. Independent engineers are rarely allowed to evaluate the robustness of the structures, and when they manage to do so, the results can be disturbing.

It is for this reason that people in India do not want new construction of dams on their territory, as they fear for the natural disasters it can cause.