Are you, or have you come across, someone who is against the carbon tax proposed by Julia Gillard? People oppose the carbon tax for a number of reasons—some strong, some weak, some simple, some complex. They may oppose any attempt to put a price on greenhouse gas emissions, or they may oppose Julia Gillard’s carbon tax in particular. Three major reasons underlie general opposition to greenhouse gas emission pricing: (1) opponents believe the full cost of a product should not be included in that product’s price; (2) opponents believe global climate change does not exist; (3) opponents believe that global climate change exists but that human action cannot mitigate it. This post will deal with the first reason, which is also the easiest to rebut.