Leaded gasoline is bad, but the worst part about it was that its use was concentrated in cities. Dose makes the poison, and kids in cities were getting a lot of

Leaded gasoline is bad, but the worst part about it was that its use was concentrated in cities. Dose makes the poison, and kids in cities were getting a lot of tetraethyllead from all the motorized vehicles driving around. That isn't an issue with avgas, which is typically used while flying thousands of feet above relatively unpopulated areas.