You mean arsenic trioxide right? The only cold remedies you will find arsenic in are homeopathic remedies which are bullshit.
“Dump all kinds of pollutants in the water? That’s an externality. Who pays the costs of cleaning that water — not that capitalist.”
yes they do you get fined
“Who pays the cost of the astronomical cancer medical bills of the people who get sick from drinking polluted water?”
The company, Sue the company that did it.
I’m not going to psychoanalyse you but i have feeling that along the line somewhere you have been mistreated by a manager at some point.