“Water wars are coming!” the newspaper headlines scream. It seems obvious; rivalries over water have been the source of disputes since humans settled down to cultivate food. Even our language reflects these ancient roots: “rivalry” comes from the Latin rivalis, or “one using the same river as another”. As the number of international river basins and impact of water scarcity has grown, so do the warnings that countries will take up arms to ensure access to water. http://news.bbc.co.uk/1/hi/sci/tech/7886646.stm