Another 11 countries will join that list in the next 25 years. However the problem is a global one. Economic growth in territories such as China, India and Indonesia is constrained by the prevailing water conditions. Clearly, part of the global water problem is increased usage of water for domestic, industrial and agricultural purposes - a direct response to the increased population. As the world's population grows, so irrigated land is expected to becoming increasingly significant in feeding people.
Water quality is also a major concern.
Sewage in particular is a severe hazard. Worldwide, polluted water is estimated to affect the health of about 1200 million people and contribute to the death of 15 million children under five every year. Sewage is not the only cause of water pollution. Intensive use of pesticides and fertilisers has increased the level of nitrates in water. This can lead to brain damage and even death among children.