Avgas (most commonly 100LL) continues to spew out lead, which was phased out for cars in 1996 in the US, is a major pollutant. [1] https://www.epa.gov/newsrele

Avgas (most commonly 100LL) continues to spew out lead, which was phased out for cars in 1996 in the US, is a major pollutant. [1] https://www.epa.gov/newsreleases/epa-determines-lead-emissions-aircraft-engines-cause-or-contribute-air-pollution https://www.epa.gov/newsreleases/epa-determines-lead-emissio... [2] https://www.nbcnews.com/business/business-news/leaded-gas-was-phased-out-25-years-ago-why-are-n1264970 https://www.nbcnews.com/business/business-news/leaded-gas-wa...