Which among the following result in the conservation of the water?

Which among the following result in the conservation of the water?
1. Wastewater treatment
2. Wasteland Development
3. Watershed Protection
4. Rainwater Harvesting
Choose the correct option from the codes given below:
[A]Only 1, 2 & 3
[B]Only 1, 2 & 4
[C]Only 1, 3 & 4
[D]1, 2, 3 & 4

Only 1, 3 & 4
Wasteland Development and Water Conservation Wasteland Development itself refers to the development of degraded land into productive land, which can provide bio-mass. It would result in water conservation only if it is integrated with water harvesting / protection. That is why, this option stands out.

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