"Libertarian" and "tax" in the same sentence. How does that even work?
Libertarians are anti-income and sometimes property tax but not anti-consumption tax. Basically the government cannot take "by force" the money that an individual earned or forcefully levy a tax on property they own. But taxing someone for polluting the atmosphere? Sure.
Carbon tax is actually very Libertarian. Greenhouse gasses pollute the commons which deprives other's of their right to quality air. I think many Libertarians would be for the government stepping in to end pollution of the commons and making companies pay for their own pollution is a fair way to do it.