The Environmental Defense Fund mercury at all costs dangerous levels of mercury in tuna Mercury Alert: Is canned tuna safe to eat? high levels of heavy metals this kind of thing http://www.edf.org/oceans/mercury-alert-canned-tuna-safe-eat Mercury alert: Is canned tuna safe to eat? mercury eating canned light tuna once a week http://www.edf.org/oceans/mercury-alert ... a-safe-eat edf.org mercury-free tuna and its mercury content edf.org http://www.edf.org/oceans/mercury-alert-canned-tuna-safe-eat mercury-free at all costs www.edf.org/oceans/mercury-alert-canned-tuna-safe-eat EDF Mercury Alert: Is Canned Tuna Safe to Eat? Mercury alert: Is canned tuna safe to eat EDF Mercury Alert: Is Canned Tuna Safe to Eat? http://www.edf.org/oceans/mercury-alert-canned-tuna-safe-eat at all costs