Explain rain water-harvesting.

Choose the correct statement regarding rain water harvesting

Which is not a true statement regarding rain water harvesting?

What is rain water harvesting ?

What is rain water harvesting?

What do you mean by rain water harvesting ? Give its various techniqus and advanrages.

It has been made mandatory to install rain water harvesting system and solar water heater in all buildings in urban areas. (i) What is the rational when rain water already passes into drains? (ii) Why are solar water heaters are being installed when electric geysers are available?

Describe the methodology of rain water harvesting.