Aviation fuel takes global warming to new heights, so why is it tax-free?

IN view of widespread concern over global warming and the enormous contribution to greenhouse gases caused by aircraft, it came as a great surprise to learn there is no tax on aviation fuel as on other transport fuels.

This must be one of the best kept secrets of our time.

It prompts this question: is there any move within the European Parliament (or indeed elsewhere in the world) to encourage such a tax?