Not really, the aircraft industry has been trying for 30+ years to remove lead from aviation fuel. It's incredibly difficult because of the wide variety of eng

Not really, the aircraft industry has been trying for 30+ years to remove lead from aviation fuel. It's incredibly difficult because of the wide variety of engines, the regulation involved, and the fact that failed engines can easily lead to death (and fuel is a common-mode failure). Private jets also fly relatively rarely. We should really start with powerplants. It's ridiculous to still be getting the vast majority of our electricity from fossil fuels. There is very little risk to human life there, and massive potential benefit. Many of these plants run 24/7 so you get massive benefits.