There are a few studies out there. This article references a couple studies as recently as 2020 which mention increased lead particles around airports. https:

There are a few studies out there. This article references a couple studies as recently as 2020 which mention increased lead particles around airports. 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... Link to actual EPA study: https://countyairports.sccgov.org/sites/g/files/exjcpb686/files/Model-extrapolated%20Est%20of%20Airbornn%20Lead%20Concentrations%20at%20US%20Airports.pdf https://countyairports.sccgov.org/sites/g/files/exjcpb686/fi... This study mentions the lead levels in children living in proximity to airports: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3230438/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3230438/ 2021 Santa Clara study found lead levels in children near airports similar to Flint michigan: https://news.sccgov.org/news-release/study-commissioned-county-santa-clara-finds-increased-lead-levels-children-living-near https://news.sccgov.org/news-release/study-commissioned-coun... Again, we are allowing leaded gas, which we know to be harmful, to be used in 2022, with demonstrable increases in lead levels especially for individuals living near airports.