Water purification by the ecosystem

Water purification by the ecosystemEdit

Preserving forests can be "a cost-effective way to provide clean drinking water because forests reduce landslides, erosion and sediment, improve water purity by filtering pollutants, and in some cases capture and store water."[1]

Note that "artificial" ecosystems work in a similar way, including reed beds,W constructed wetlands, and any device making use of a biofilm, such as a roughing filter or slow sand filter.


NotesEdit

  1. This was found to be the case in many cities including Melbourne and New York. See the news report It's cheaper to grow your own clean water, abc.net.au/Reuters, 2 Sep 2003, based on the 114-page World Bank & WWF report Running Pure: The importance of forest protected areas to drinking water, August 22, 2003



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