Why is the shortage of water in the earth?
Kindly refer to the similar link :
https://www.meritnation.com/ask-answer/question/what-is-water-scarcity-and-what-are-its-main-causes/water-resources/1013590
https://www.meritnation.com/ask-answer/question/what-is-water-scarcity-and-what-are-its-main-causes/water-resources/1013590