If you eat fish, you should read this article. AP reports that scientists around the world are concerned about the lack of testing and labeling of fish which are often laden with mercury, dioxins, PCBs and other chemicals. Since very little testing is done, there is little information about contaminates which vary from fish to fish and from area to area. The fishing industry has lobbied hard to keep warning labels off their products, and except in California where a statewide proposition makes a warning label mandatory, they've succeeded.
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