Traffic
That is the point. In a couple of European countries where a carbon tax has been in place for well over 20 years, what has actually happened. CO2 output has actually increased.
It is a grubby illegitimate tax.
And if you think the CO2 tax adds only 5-6 cpl, WRONG. That is the direct tax on that litre. All the indirect tax components on the factory manufacturing the fuel will increase costs of production. The increased costs on delivery. The increased cost on employees along the way, will apply wage (inflationary) pressure. I am not an economist, but I can assure everyone reading this, the CO2 Tax on a litre of AVGAS will NOT result in just a 5-6cpl increase in cost over the next year. When all the hidden costs start affecting things, it will be more like double the tax.
So peterc and anyone else who thinks this is a really smart move. YOU ARE WRONG. No matter how much spin you apply.