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How many methods of rainwater harvesting are there?

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in Energy Management by (679k points)
How many methods of rainwater harvesting are there?

(a) One

(b) Two

(c) Three

(d) Four

I have been asked this question in final exam.

I'm obligated to ask this question of Water Conservation, Rainwater Harvesting, Watershed Management in chapter Social Issues and the Environment of Energy Management

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Correct option is (b) Two

The best I can explain: There are two ways of harvesting rainwater, 1. Surface runoff harvesting: In urban area rainwater flows away as surface runoff, this runoff can be used for recharging aquifers. 2. Roof top rainwater harvesting: It is a system of catching rainwater where it falls.

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