Several weeks back, an investigation of tuna served in Chicago restaurants found that 70 percent of tuna sushi samples tested were contaminated with mercury. One in seven samples contained levels of mercury so dangerous they exceeded that of king mackerel, which the FDA says women and children should never eat. Even more recently, the outbreak of E. coli from fresh packaged spinach, which spread to 21 states and killed one person and sickened more than 130, has gotten everyone thinking about ...

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