I found this fascinating: 

The incredible drops in poverty rates experienced across much of the world may also bring some unexpected problems: conflict over water resources, Clark Judge notes in U.S. News and World Report.

“[D]espite the worldwide economic downturn, vastly more people are middle income or approaching middle-income status than was conceivable in, say, 1980,” Judge writes. “But more prosperous populations are also better fed. For example, it takes about 40 liters of water to produce a slice of bread, a staple of low-income diets. It takes 2,400 liters to produce a hamburger, common in many middle-income diets. Put rising population and rising incomes together and, experts tell us, by 2050 global food needs will double, with water requirements going up accordingly.”

From Fareed Zakaria: http://globalpublicsquare.blogs.cnn.com/2013/02/20/what-were-reading-13/

This makes me want to invest in land with my own dedicated water source.  Maybe a farm or working ranch somewhere away from the desert, tornadoes, and earthquake zone…  But by 2050, I should be close to extinction.