Both
population levels and economic development are important drivers of world water
use. If current patterns continue, the World Water
Council estimates that total yearly withdrawals will rise to more than 5,000 km3
by 2050 as world population rises from 6.1 billion to 9.2 billion. During the
20th century, world population tripled but water use rose by a
factor of six. The United Nations and the international
community have set goals of halving the number of people without adequate safe
drinking water and sanitation by 2015. Meeting this target will require
providing an additional 260,000 people per day with clean drinking water and an
additional 370,000 people per day with improved sanitation through the year
2014, even as overall world demand for water is rising.
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