> This might have been covered in some part I skimmed over, but they never seemed to offer a mechanism for contaminated water in a drainage basin entering the l

> This might have been covered in some part I skimmed over, but they never seemed to offer a mechanism for contaminated water in a drainage basin entering the local food supply via processed foods in a way that wouldn’t also impact a plant-based (e.g. potato-only) diet. The higher the food chain you go - the higher amount of contaminants deposited. One of the most famous examples of this is mercury levels is higher in large fish as the food chain is longer.