Matthew Yglesias usefully rips into the wilfully dumb kind of “libertarian”:
It’s worth going back to first principles on markets, property rights, and air pollution. To have a functioning market, you need to have property rights. And property rights need to be defined in some way or other. This includes taking some view of the relationship between property rights and particulate emissions into the air. On one conceivable conception of property rights, the Sierra Club could buy up a field somewhere and then assert that its property rights over the field give it the right to exclude any form of air pollution from wafting into its field. On that definition of property rights, which is the one “the Greens” would favor if we really wanted Stone Age economic conditions, industrial production would swiftly become impossible. You couldn’t so much as warm yourself with a fire before neighbors were accusing you of tresspassing for depositing microscopic soot particles in their lawns.