...they still allow/use LEADED fuel in aircraft everywhere in 2022 despite everything horrifying we know about that now. It's not just a lack of care for health

...they still allow/use LEADED fuel in aircraft everywhere in 2022 despite everything horrifying we know about that now. It's not just a lack of care for health of a population, there has to be some serious profit/politics in that decision. This specific complaint is kind of silly, since there is no "population" at risk in the aviation context. The use of tetraethyl lead for a single day by automobiles in urban areas where children live was worse for human health than its use for decades at aviation elevations over wilderness where most aircraft spend most of their operating time. There could be concentrations around airports I guess, but those would be better dealt with by local regulations than by a blanket ban. It is good for humanity that aircraft built in the 1940s are still in use today. Obsoleting all those engines would be harmful.