Water is the most crucial of natural resources for both land conservation and the welfare of humankind. The basic requirement to support life is 4 litres of water daily and a typical city resident requires about 400 litres daily for his services and requirements; cleaning, cooking, bathing and cleansing.
Freshwater for human use, discovered in lakes, rivers and swamps makes up just 0.008% of the earth’s water. Freshwater is an important part of life on earth and disturbance of the cycle of water system and need can have terrible impacts upon land, plants, people and animals. Due to the fact that the water cycle restores the flow of rivers, groundwater and glaciers, real run off from these sources can exceed 47,000 km3 annually.
Water is saved in aquifers, which are big below ground caverns. In parts of the Middle East and North Africa the ratio of groundwater usage to aquifer recharge is presently approximated at 4:1. Roughly 3,000 lots of water is needed to produce one tonne of wheat in these and other deserts.
