antibiotics
given to animals to prevent disease and make them eat more so they grow faster.
when consumed by humans (through milk/flesh), they can build up resistance against antibiotics
artificial hormones
rBST is injected into cows to stimulate production of milk. leads to deformed calves and can lead to breast or colon cancer in humans.
plastics
materials such as styrofoam and polystyrene are used to package good and drinks. pollution of plastics can release chemicals that can be harmful to people’s health.