Around 1,100 million people they do not have access to an improved water provision, and more than 2,600 million people they lack access to improved services of cleaning. The water shortage affects to approximately between 1,000 and 2,000 million people anywhere in the world. From 1960, the difference between water use and accessible provision have increased in a 20% per decade. The desert ground affects means of subsistence of million people, including a great amount of the poor men of dry earth.[1] FAO's recent report World agriculture: towards 2015/30 projects that global food production will need to increase by 60% to close nutrition gaps, cope with the population growth and accommodate changes in diets over the next three decades. Water withdrawals for agriculture are expected increase by some 14% in that period, representing an annual growth rate of 0.6%, down from 1.9% in the period 1963-1999. Much of the increase will take place on arable irrigated land, forecast to expand globally from some 2 million sq. km to 2.42 million sq. km. In a group of 93 developing countries, water use efficiency in irrigation-i.e. the ratio between water consumption by crops and the total amount of water withdrawn-is expected to grow from an average 38% to 42%. The water needs of humans and animals are relatively small-the average human drinks about four litres a day. But producing the same person's daily food can take up to 5,000 litres of water.