World markets are more leery of farmed salmon from Chile after a study in January's edition of the journal Science found it contained elevated levels of some cancer-causing toxins, including PCBs and dioxins. Chile's farms are not subject to the strict environmental regulations imposed on Canadian, U.S. and European farms, critics say. Imports of Chilean salmon in the U.S. are down 20% in the first three months of this year compared with last year, but one seafood executive in Chile says, "Chile has very low contamination" and adds that media reports about the study are misleading Americans.

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