Just another government rip off tax. How can that help to cut carbon emmissions? It won't reduce air travel at all and it probably won't be used for what it's supposed to be used for just like road tax.
Yes, Bingalau,it woould bring prices down. However it would also spell the end of business for a lot of smaller airlines, leaving the larger airlines to have a monopoly on air trade. In consideration that might not be a bad thing, but I do like to see some competition in that business.