I don't mean to nit-pick, but 'petrol' and 'gasoline' are not generic terms for fuel. Some (piston-engined) propeller airplanes use petrol/gasoline, and are usually exempted from certain local taxes (as are marine users and farm users). Airliners are usually powered by turbine engines (often 'jets'), fueled by kerosene (or one of the JP-series fuels) which fall under their own tax regimes.
*addendum: apparently Canada has implemented or is planning to implement a carbon tax on aviation fuel.
Thanks. If I say "petroleum" would that cover all types of dinosaur juice?
(I only want to cover the liquids, not coal or wood)
Petroleum generally refers to the unrefined substance; you could use 'petroleum products' to cover all the bases.
If we are serious about cutting CO2(-equivalent) emissions, we must tax all emittors equally. Airlines should not be able to escape it, or we will keep seeing this kind of oddities in that high pollution industry.