Leaded fuel is still used in av gas for small planes. Avgas 100 has a high lead content. Where I live there is a secondary airport that mostly flies Cessna's e

Leaded fuel is still used in av gas for small planes. Avgas 100 has a high lead content. Where I live there is a secondary airport that mostly flies Cessna's etc where people go to learn to fly. It's surrounded by residential and depending where you live planes every three minutes endlessly doing circuits, quite low in some places. At one stage I think it was the busiest airport in the world. I avoid living in the suburbs under the approach, seems to be a dirty secret about the fuel.