Maybe you should read a study before citing it: > On the basis of distance to airport coefficients, children living within 500 m, 1,000 m, or 1,500 m of an air

Maybe you should read a study before citing it: > On the basis of distance to airport coefficients, children living within 500 m, 1,000 m, or 1,500 m of an airport had average blood lead levels that were 4.4, 3.8, or 2.1% higher, respectively, than other children. > Based on the geospatial and statistical analysis presented above, lead from avgas may have a small (2.1–4.4%) but significant impact on blood lead levels in children who live in proximity to airports where avgas is used. The magnitude of the estimated effect of living near airports was largest for those children living within 500 m and decreased in a monotonic fashion out to 1,500 m. 2-4% higher doesn't exactly scream environmental crisis to me. Especially when it's limited to an area under a mile from known locations and can be easily avoided if one wishes. > Although controlling for individual- and group-level confounders attenuated the association between logged blood lead levels and residential proximity to an airport, evidence of a deleterious relationship remained. In the adjusted models, control variables behaved as expected: Relative to being screened in the winter season, children tested in the spring, summer, or fall had increased blood lead levels, on average. Residence in poor and minority neighborhoods was also associated with elevated lead levels. In contrast, recently constructed housing units were associated with decreased mean lead levels. Interesting how the correlation isn't as strong as one would imply and there's other factors at play too. If you close all of the airports it's not going to drop lead exposure to zero. So let me re-iterate my original point again: Obviously 4.4% elevated lead levels (in the worst case, ~1,500ft from an airport) isn't something to accept as "this is fine." Instead of taking the burn it down approach, close all airports, ground the GA fleet, and destroy an entire industry, let's get the FAA off their butts and get G100UL rolled out across the board so we can stop this silly argument about a tiny percentage of lead exposure. Which, mind you, is peanuts compared to lead pipes still in use.