LA Times article - Dead zones off Oregon and Washington likely tied to global warming, study says
The article also mentions that "A massive dead zone off Louisiana is created each spring by a slurry of nutrient-rich farm runoff and sewage that flows out the Mississippi River, causing algae to bloom riotously, die and drift to the bottom to decompose. Bacteria then take over. In the process of breaking down the plant matter, they suck the oxygen out of the seawater, making it unable to support most forms of sea life". The one in Oregon is just caused by changes to the atmosphere.
The dumping of sewage in the Ocean is a waste of resources, but there is so much other toxic junk mixed in with sewage it can't be safely used for much of anything. It's amazing the amount of toxic chemicals used in a house. Animated site that shows some sources of toxics. The problem is figuring out what is toxic, verses what is not.
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