well, she's an environmentalist. As for your question, the main problem with Hydro electric plants is its meagre output. the investment you make doesnot justify the amount of power output from it. Moreover, the functioning is based on a lot of variables that sometimes are not reliable themselves. Thats why most of India's power comes form the thermal powerplants instead of the hydro electric powerplants. you could say that building a hydro electric project purely for the electricity is a thing of the past now.
