Yeah, while there's no "safe" level of lead ingestion, not only do we not use leaded gas in cars, commercial aviation (with very few exceptions) does not use it

Yeah, while there's no "safe" level of lead ingestion, not only do we not use leaded gas in cars, commercial aviation (with very few exceptions) does not use it either, and the private/general aviation piston-engine planes are emitting it several thousand feet in the air, not at street level around houses and people. We should get rid of lead in aviation fuel, but it's not a substantial source of environmental lead these days.