I have included this article because of the dire possibilities concerning wars over scarce resources. However I do not endorse the Christian, religious propaganda it contains. (Ric)
As populations increase, water will become more scarce, increasing tensions. UN figures suggest that there are around 300 potential conflicts over water all over the world. According to the World Health Organization (WHO), about one-sixth of the world’s population lacks access to clean water, while 40% are without access to proper sanitation services.
Competition for water has grown so serious that at the World Economic Forum in Davos, Switzerland, UN Secretary-General Ban Ki-moon warned, “A shortage of water resources could spell increased conflicts in the future…Population growth will make the problem worse. So will climate change. As the global economy grows, so will its thirst. Many more conflicts lie just over the horizon” (Inter Press Service).