Worldwide Water Crisis
The use of renewable water resources has grown six-fold. Within the next few years, the world population will increase by another 40 to 50 %, coupled with industrialization and urbanization – will result in an increasing demand for water . Also spatial and temporal variations in water availability, means that the water to produce food for human consumption, industrial processes and all the other uses is becoming scarce. There has been a profound effect on aquatic ecosystems and their dependent species. Environmental balances are disturbed and cannot play their regulating role anymore.
 
The imbalance between water use and water resources has resulted in water stress. Water stress causes deterioration of fresh water resources in terms of quantity (aquifer over-exploitation, dry rivers, etc.) and quality (eutrophication, organic matter pollution, saline intrusion, etc.).