Originally Posted by
RatherBeFlying
Before unleaded gas came into use in the mid 70s, cars were broadcasting lead on every road. That lead has mostly remained where it came down.
Neighborhoods adjacent to expressways have been found to have elevated soil lead levels, I suspect considerably more than adjacent to airports.
Leaded car fuel is no more. That’s 99.9+% of daily usage leaded fuels gone. That’s the big dosage number of concern. The poofteenth of lead that aviation puts out is swamped by natural sources of lead.
Smoke from bush fires contains lead. The dust that blows around the desert contains lead. Sea water contains lead, Sea food contains lead, etc, etc, etc. Go for a swim at the beach and yer gets a dose of lead.
The claims that humans should have a nil lead exposure is compleat nonsense. Ever since time began humans have been bathing in water containing lead, drinking water containing lead, Eating food containing lead…