[Elzear]

Unfortunately, airlines avoid taxes on aviation fuel because of the Chicago Convention. It could be difficult to enforce a carbon tax on fuel for international flights.

Nitpicking: one transatlantic flight emits 2 tons of CO2 per passenger, a human emits 4 tons per year per capita on average.

[iso1631]

> Unfortunately, airlines avoid taxes on aviation fuel because of the Chicago Convention. It could be difficult to enforce a carbon tax on fuel for international flights.

Why can't airports be taxed based on the CO2 generated by planes landing at them? The airport can recover this from the airlines however it wants, including incentivizing lower polluting planes by charging lower landing fees.