Question

How do you say that the tanks are helpful to mankind?​

Answer 1

Tanks are part of an ancient tradition of harvesting and preserving the local rainfall and water from streams and rivers for later use, primarily for agriculture and drinking water, but also for sacred bathing and ritual. Often a tank was constructed across a slope so to collect and store water by taking advantage of local mounds and depressions

Answer 2

Answer:

here it is...

Explanation:

Following are the useful ways of utilising wastewater:-

• (a) Wastewater can be used to recharge the groundwater
• (b)Wastewater can be used for irrigation
• (c) treated municipal water can be used for washing cars, watering the gardens
• (d) certain pollutants in sewage water can become fertiliser for various crops.