Avoid completely? No, but you can limit exposure. Even if you were living in the 60s when everyone smoked in public/at work/on planes, it was still healthier to not smoke and sit in non-smoking sections where they existed.

In the case of plastics, filtering water helps. Even simple charcoal filters can catch a lot of it. Store your food in glass containers as opposed to plastic. Don't use non-stick cookware, some type of metal + fat works fine once you get a practiced technique. Use a stainless steel thermos, and minimize the amount of time hot liquid comes into contact with plastic components/containers. Heat breaks down plastics more easily and generally results in higher levels of contamination. Cold water passing through a plastic tube in your fridge is probably fine.