About 20% of the world's population has no access to safe drinking water, and this number will increase as the population continues to grow and global freshwater sources continue to decline. The worst-affected areas are the arid and semiarid regions of Asia, the Middle East and North Africa.
http://www.unesco.org/new/fileadmin/MULTIMEDIA/HQ/SC/images/WWDR2015_03.pdf" aria-label="UNESCO has reported">UNESCO has reported that the freshwater shortfall worldwide will rise to 500 trillion gallons/yr by 2025. They expect water wars to break out in the near-future. The https://www.weforum.org/agenda/2015/01/why-world-water-crises-are-a-top-global-risk/" aria-label="World Economic Forum">World Economic Forum says that shortage of fresh water may be the primary global threat in the next decade.
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