Recent evaluations show that if we continue to use water in a "business as usual" manner several countries will have widespread water shortages. This is a particularly important issue for the two most populated countries China and India and the other water stressed Mediterranean and Middle Eastern areas which are experiencing the most rapid population growth. This chapter will provide data to show how precarious the water situation is in these places of the world.
Projections of global water demand suggest that if we continue to use water at current rate we will likely exceed water supplies in many parts of the world over the next 25 years. Projections show that if we do not become more efficicient in the way we use water we will have widespread water deficits in many parts of the world.
The water gap between demand and supply is of particularly of concern in the world's two most populated countries - China and India. In a "business as usual" scenario both countries will have a significant water gap, unless major changes are made in the way water is used.