It's 'low lead' compared to the previous 100 octane avgas it replaced, not in some absolute or objective sense. It contains more lead than automotive gasoline b

It's 'low lead' compared to the previous 100 octane avgas it replaced, not in some absolute or objective sense. It contains more lead than automotive gasoline back when autogas still contained lead. While it's nice there's finally some progress made in unleaded high octane avgas (G100UL), from a public health perspective it's not a huge issue compared to many other sources of lead in the environment.