Question

Indian subcontinent is already classified as water stressed elucidate

Answer 1

Water stress happens  when the demand for water exceeds the available amount during a certain period or when poor quality restricts its use.
-Unsustainable water use;this happens as a result of using more water than can be replenished.
-Climate change;a warming climate is likely to play havoc with the Himalayan glaciers which are the source for some of Indias most important rivers such as the Indus,Brahmaputra and the Ganga.
-Untreated sewage;the waste from the untreated sewage contaminate the ground water due to discharge into the rivers,tickling health bomb in india.