Lead is Persistent

 I saw this story on ArsTechnica:

https://arstechnica.com/science/2022/08/backyard-hens-eggs-contain-40-times-more-lead-on-average-than-shop-eggs/

Although this was in Australia I suspect it might be true for urban chickens in the US, too.  And most of the lead comes from the burning of leaded fuel in cars.

According to this site, tetra-ethyl-lead combusts in gasoline to form lead oxide:

https://www.shell.com/business-customers/aviation/aeroshell/knowledge-centre/technical-talk/techart-18-30071600.html

Also, I didn't know that airplanes still use leaded gas.

To me this would also beg the question:  what about urban garden produce ?  What are the lead levels there ?

Yikes !  Sometimes persistence is NOT a virtue.

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm