Question

Describe rainfall harvesting

Answer 1

Rainwater harvesting is the accumulation and storage of rainwater for reuse on-site, rather than allowing it to run off. 

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Answer 2

Rainfall harvesting is a technique to store rainfall water and use it in future for imporatant use in future.
There are many ways to store rainfall water.
The main practice followed is Rooftop rainwater harvesting....in which the water which falls on the roofs of the buildings..is stored in underground tankas....for further use.