The market cannot take into account to cost of externalities, unless there is some mechanism to charge for them (meaning tax them). The other option would be t

The market cannot take into account to cost of externalities, unless there is some mechanism to charge for them (meaning tax them). The other option would be to eliminate the concept of externalities by making everything owned by someone, but I don't see how that could work. You would have to come to an agreement with whomever owns air quality before you polluted and come to an agreement with whomever owns temperature before you caused warming...