Question

The diameter of recharge wells is ___mm.

1--2
10--20
100--300
1--1.5
​

Answer 1

Explanation:

Fresh water is scarce

Of the total water on earth, only 3% constitutes freshwater. Rest is saline water in the oceans.

11% of the total freshwater on earth is groundwater available upto a depth of 800m which can be extracted for use.

Mindless extraction and over exploitation of very small quantity of this precious nature resource has caused a rapid depletion and deterioration in its quantity and quality both.

Distribution of fresh water on earth

Methods and techniques for ground water recharge