Over the last thirty years, the availability of water increased from an average of 12 900 m3 à 6800 m3 per capita per year.

Non-potable water is the first cause of death in the world, to Wed 10 times more than the wars.

It is estimated that non-renewable groundwater reserves (our human time scale) was multiplied by 3 in 40 years and still is to this day 20% the global irrigation.

6,1 billion people have access to safe drinking water 2010 ; international higher than the target rate to reach 88% World population served by 2015. But it remains 2,5 billion people without access to sanitation.

Soils, also, are subject to intense erosion with a threat to global agriculture. In some areas, soils are leached 100 times faster than they can regenerate.