[Fatnino]

Leaded gasoline, like that still found in aviation gas? Hope you never have small panes flying over your living spaces.

[coffeecat]

It sucks that leaded aviation fuel has persisted so long, but the resulting Pb exposure is insignificant relative to what people were exposed to from leaded gasoline in cars back in the day. Mean BLLs in the mid-70s were ~15 mcg/dL; nowadays mean BLLs are significantly below 1 mcg/dL, and ~1 mcg/dL is 95th percentile.