Water is a source of life but the world has a total of 1.65 billion km3 of Water. However, only 0.3% of this total quantity is theoretically usable as a fresh water, and only 10% of that i.e. 0.03% of the world water is capable of economical utilization.

In the environment report Global 2000 the following comments occur:

The notion that water is a freely available resource will no longer be encountered anywhere in the world in 20 years time.

Worldwide sea water desalination has been a very effective and economical way of producing potable water for drinking and industries. It is a myth that, sea water desalination is exorbitantly expensive. But the fact that it is affordable.