What are people saying?

Apparently many small airplanes use leaded fuel. And it affects children living near runways.

EPA targets lead airplane fuel, citing children living near runways - Washington Post

A new generation is being poisoned

Analysis: Getting the lead out of our skies

Alternatives exist:

Iconic DHC-2 Beaver receives ‘first in the world’ RED Engine upgrade

There is another alternative, “100LL (100 octane low lead) avgas”, but it seems to be not very popular with the “de Havilland Canada DHC-2 Beaver” aircraft. Perhaps someone could identify a reference to correct this?