ABSTRACT
According to the United Nations, the world demand for clean water in the last century has increased sevenfold due to the quadruple increase in world population [1]. This has resulted in the lack of clean water availability to nearly 35% of world population and the majority of them reside in countries with low development index. Due to the nonavailability of clean water, combined with low sanitation level in these parts of the world, there have been widespread waterborne diseases, and it has been estimated that every year nearly 3.4 million deaths occur. In addition, the majority of these cases include children under the age of 5 years [2]. Because of the important role of clean water in human development, the United Nations has declared the decade 2005-15 as the decade for “water for life” [3].
