Avoiding leaded gasoline in aviation I would like to get into aviation, but I have concern about the leaded gasoline used in most small engine planes.  How difficult will it be to avoid avgas while learning to fly?  And how should I go about doing this?  In particular, is it typical for flight schools to have diesel planes available for flight instruction, and is it reasonable for me to insist on this?
You could fly gliders. They don't use leaded fuel. In fact, they don't use fuel at all.