Photos: Jennifer Emerling When faced with the decision to buy factory farmed or 100% wild salmon, dramatic price differences usually make the call for most people. However, consumers must take into account the health risks of these choices.   Factory farmed fish are fed a steady diet of protein pellets containing dioxins, PCBs, fire retardants, pesticides (for sea lice), antibiotics, copper sulfate (to keep nets free of algae), and dye that has been linked to human retinol damage (without it, the flesh would be grey). Gross.   Not only are there health risks involved with eating factory farmed fish, but…