Quote:
Originally Posted by Richard
The hydrological cycle does have boundaries, especially with regards to fresh water resources. You need to read a bit about hydrological catchments and hydrological basins.
Also, the amount of potable water isn't constant. The amount of fresh water may be relatively constant but much of this doesn't reach drinking water quality standards and so has to be treated to potable standards. Potable water is largely artificially produced nowadays in water treatment plants.
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I will read more about the hydrological process but my main point was water waste in one area does have an affect on water in other areas. If you pollute your fresh waters in one area, isn't it possible for water to become "untreatable"? I'm constantly learning so if you can point me to some links/books as well, that would help in my research.