I like this idea — I think we should tax consumer fuel based on its CCS; so, about 2$/gallon. I don't think that'd happen any time soon...

The only problem is that all the fuel used in all of private aviation is a drop in the bucket of total carbon emissions. It's not low-hanging fruit. It's not really fruit at all.

There is no safe dose of lead. Ideally, I wouldn't want to spread any lead during my run-ups.

Yes, but I was commenting about the idea of a "carbon tax" on aviation fuel.

Now a lead tax might be something to think about if the non-leaded fuel costs more for some reason, lead being more of a concern than carbon in this instance. Tax the lead to make it the more expensive option.

Sorry but please read up on how much lead is dumped over neighborhoods near airports. Children have lead levels near reported Flint levels.

That is the issue at hand in this story, but not really the comment I was replying to (at least primarily).

Leaded avgas is coming from piston-engine aircraft, and I don't think that was really what OP was talking about when commenting about the people flying private aircraft while publicly demanding people stop driving pickup trucks.

For leaded gas, we can simply ban the leaded gas, as the cost of performance in piston-engine aircraft. I'm not really an expert, but at a first glance I see no particularly compelling reason not to do it, so I'm not opposed to that at all.

Carbon is either a pollutant, or it's not. It's either good to put into the atmosphere, or it's not. All you can hope with a carbon tax is to shift the problem around without really accomplishing anything.