By the year 2025, 35% of the world’s projected population will live in countries facing water shortages.

ACTION ON SOLUTIONS
An ecosystem approach: Natural ecosystems have intricate and resilient mechanisms that filter and replenish freshwater resources and sustain marine environments. Although human technologies may enhance or replicate these mechanisms in some settings, protection of the natural watershed also is critical. An ‘ecosystem approach’ recognizes and ascribes value, including economic value, to the ‘services’ natural ecosystems provide in terms of water filtration and purification, and ensures their sustainability, through modern management regimes.

http://www.worrellwater.com/water_facts.html