ABSTRACT
Water is essential for survival. It has been estimated that human beings need at least 18 to 23 litres of water a day to survive. While there is enough water in the world for everyone, access to that water is a considerable problem. Recent studies forecast that, under current water management conditions, 35 per cent of the world’s population will run short of water in the next 25 years. Even in areas where water is not scarce, many people do not have access to it. More than 1 billion people lack access to safe drinking water (two-thirds of them live on less than US$2 a day) and more than 2.6 billion lack access to improved sanitation.
