71% of the Earth's surface is covered with water. On Earth, it is found mostly in oceans and other large water bodies, Saltwater oceans hold 97% of surface water, glaciers and polar ice caps 2.4%, and other land surface water such as rivers, lakes and ponds 0.6%.
Clean, fresh drinking water is essential to human and other life. Some observers have estimated that by 2025 more than half of the world population will be facing water-based vulnerability, a situation which has been called a water crisis by the United Nations. Water plays an important role in the world economy, as it functions as a solvent for a wide variety of chemical substances and facilitates industrial cooling and transportation. Approximately 70 percent of freshwater is consumed by agriculture.
So, how does Singapore manage her water needs?