Comment: This is where Milton Friedman

uniquely enters the conversation.

It is a straightforward for Libertarians to try to keep the government out of regulating people lives and let courts to decide whether one can prove that his/her health had been damaged.

Now, putting aside that such a proof could be expensive for a single person (or a small group) and the damage might be too great, consider this:
a. an "impact" comes in small portions from different private companies, foreign and domestic;
b. effect from one such an "impact" is not enough to cause the health problem.
c. over a long period of time, combined effect does cause health problem.

Q: Whom to sue and with what money?
Milton Friedman advocated some role of government in this area, while Ayn Rand advocated homestead principle instead. But this is a good area to debate.