problem 1: describe the problem occurs due to excessive use of ground water.

problem 2: What do you mean by water shed management? describe the different methods of water shed management.

problem 3: Define the term Desalinization. List all the different methods for desalinization of saline water.

problem 4: Define the term rain water harvesting. describe different methods for rain water harvesting.

problem 5: prepare short note on the given:

a) Reverse osmosis
b) Distillation
c) Cloud seeding