yeah, that's always the threat - "following basic environmental safety rules will kill ____". but just because you say it, doesn't make it true. GA flying is

yeah, that's always the threat - "following basic environmental safety rules will kill ____". but just because you say it, doesn't make it true. GA flying is important for a lot of industry, and a lot of remote communities. it might have taken some work, but they could have found a way to use unleaded fuel in airplanes in fewer than 50 years.