On pollution and trade

Background: so for me I partially define libertarianism as: I’m not liable for the consequences for anyone else’s decisions. However there are two edges to this sword, and I think a lot of us tend to ignore the other part: I then have to be accountable for all of the consequences of my decisions. Anyways, the obvious conclusion from this is that businesses in the US cannot pollute the environment to an extent where it infringes on anyone else’s liberty (whether this should include future generations is up for debate). What this looks like is exhaust treatment in combustion plants, farmers can’t hike nitrate levels to the point where it hurts fisheries, etc.

For the sake of this hypothetical, only consider environmental restrictions that you believe to be just, insofar as you feel they are protecting your own or others liberties.

The point: in requiring our own businesses and production to do these things (plus, let’s face it, at a minimum we would need to pay for some sort of environmental court for settlements) we are costing them money. And the crux of this issue is that, its simply free to do it somewhere else. So let’s say I own a lithium refinery, near a town, and I have to keep all my waste water, and emissions to a level, so that I do not force health costs on residents. However, my competitor in let’s say China is able to violate the liberties of their residents, and thereby lower costs. Isn’t the government therefore effectively subsidizing foreign competitors, and outsourcing. Do you think we should have some form of environmental tarrif system in place to account for this?