The problem is, that there is no problem.
Both CO2 and using low-lead fuels is not a real problem of concern in the context of global transportation.
The problem is that some individuals disreguard both reason and porportion in order to put a check in a box that they have created. The same people prize that check in their box higher than tangible helping or creating (or even just leaving other people alone). It’s insideous and no one seems to have the guts to tell them to stop destroying.