If we know that a candle factory is causing 1/36 deaths to lung cancer, we don't need such a mechanism (or the involvement of an arbitrary family) to take the operator to court. At least not in the UK.
My backyard bonfire in the UK produces so much smoke I'm sure someone somewhere will be given lung cancer from it. Yet, it's perfectly legal and there is no carrot or stick to encourage me to buy an incinerator or start composting.
Having a small chance of a knock on my door and someone saying "Excuse me, but you killed grandpa, plz pay for his funeral" probably would make me change.
