Coal is a relative small contaminant. Check the documentary Salmon Confidencial and you’ll find that farmed Salmon is contaminated by the food provided: contamined eels from the Baltic Sea. Even the cod has started to suffer genetic mutations. The Baltic borders 4 countries, the water takes 30 year to fully renew and it was contaminated by Chernobyl disaster. Not to mention the amount of antibiotic that can produce new resistance bacteria’s that might kill you. We’re reaching the point where aquaculture will the safe method to consume fish.