The World’s Most Valuable Natural Resource – Water

A very good report from Der Spiegel –

http://www.spiegel.de/international/world/global-water-shortage-exacerbated-by-droughts-and-misuse-a-1047527.html

Several major conflicts in the 20^th century were directly or indirectly related to oil. It is likely that the 21^st century will be defined by clashes over fresh water.