Whatever you think, you're wrong.
If your actions cause damage to my person or property, I have every right to see that damage redressed. In a civil society, the government is the way we redress that damage.
If you're dumping garbage on my property, the government has every right to pay to clean it up and charge you for the damage your actions cause. If that modifies your behavior and you stopping dumping trash on my lawn, so be it.
It's exactly analogous if you're pumping trash into my air. The government has every right to charge you for the damage your actions are causing, and use that money to better society. That's what a gas tax is, and a higher gas tax would give people a much clearer idea of the actual costs of their decisions.
They're called negative externalities. The free market system isn't even guaranteed to be an overall positive sum game if they aren't addressed. They're *exactly* where your freedom to choose ends. In this case, your freedom to choose ends at my lungs. Limiting negative externalities are one of government's legitimate purposes.