Linked from
The 16 pages that link to Carbon tax, each with the reason it gives.
ExternalityBroader topic: It prices climate damages that emitters otherwise impose on others.
TaxationBroader topic: It uses a tax price to discourage greenhouse-gas emissions.
Carbon footprintRelated: A price on emissions can make footprint reductions financially valuable.
Pigouvian taxBroader topic: It applies Pigouvian reasoning to climate-related emissions.