There was some thread yesterday that brought up that all small propeller driven planes/GA in the world use leaded fuel still because it was simpler to keep that

There was some thread yesterday that brought up that all small propeller driven planes/GA in the world use leaded fuel still because it was simpler to keep that instead of forcing a changeover. So not only is it constantly spewed out but also in miniscule quantities in every farm product that gets crop dusted in the USA.