So, What is Rainwater Runoff, and how it can benefit Mankind: With the rapid Urbanization, the porous soil surface is declining. Thus, the natural absorption of rainwater by the soil has declined tremendously, resulting in drying up the natural aquifers. Rainwater Runoff is the Rainwater which falls on the hard surfaces, like the Roads, cemented sidewalks etc, and does not get absorbed by the soil, to fill the underground Aquifers. It either gets evaporated; or after creating a flooding, goes...