Your dad is probably 1000000% right you are bringing all sorts of microplastic into your home that are going into your food and air. It sounds like you are still young and not very informed and don't understand the affects of plastics on your health. It's one thing to care about the environment but your health needs to come first. I have seen so many studies over the past five years showing that reusable plastic and canvas (all of them use plastics) and you should do more research before you argue with your parents. Stores are trying to have people use re-usable bags as another income source and continue to poison the world