"And beside where on this earth can you find farm raised fish that are not exposed to air pollution emissions? Where can one go in IN that does not have a power plant buring coal nearby?
Not anywhere in Southern IN that is for sure."

Yeah but at least fish farm pond not connects to rivers and creeks that take all the water runoff and pollution from the surrounding land and they don't eat other bait fish which already being contaminated. Whatever pollution fall directly onto the pond is probably so minutes that it have no harm.