state gov TSPSC Group 2 (తెలంగాణ గ్రూప్ 2) Mock Test Series General Knowledge Ecology and Environment Conservation efforts: India and World
The term ‘Four Waters Concept' is sometimes seen in the news in the context of:
1
indigenous wastewater treatment method.
2
indigenous watershed development technology.
3
micro-irrigation technique.
4
technique to produce drinking water from oceanic water.