Ayn Rand was not a market anarchist, as you seem to be suggesting. Ayn Rand believed that the role of the government should be to protect people from other people. Putting harmful chemicals in the air is no exception, if they are truly harmful (as in this case).
People constantly misrepresent Ayn Rand and slander those who agree with her. Please stop.
People constantly misrepresent Ayn Rand and slander those who agree with her. Please stop.