Posted by conner on Friday, July 17, 2009 at 3:33pm.
Here are a number of sites:
http://www.hwr.arizona.edu/globe/h2oissues.html
My immediate ideas:
Massive pollution of the all water sources, in the ocean from dumping garbage of all sorts and in fresh water from chemicals.
Over fishing... check particularly on sharks.
Too many dams on rivers inhibiting flow and fish propogation.
Expanding population.
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