this post was submitted on 15 May 2025
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A lot of the people running the show still had a pretty decent amount of exposure to lead thanks to automotive fuels. Leaded gasoline didn’t start to get phased out of US fuel system until 1975 (phasing it out of regular octane) and wasn’t full phased out until 1996.
It was actually such a major source of lead exposure for children that it has led (ha) to a hypothesis that a sharp decline in crime rates beginning in the 1990s is directly attributable to the phaseout of leaded gasoline. Of course other things may have influenced this or even caused it like increased access to abortion services, social welfare programs, etc. it is also linked to higher cognitive functioning since then; new kids are more smarter
Elon musk left South Africa in 1989 and they didn’t phase it out until 2006. He had much more recent exposure though someone like Trump, born 1946, had much longer exposure (at least 29 years before the levels started to drop significantly)
fun fact: despite the above leaded gas still remains in the us. It is allowed for racing nonsense though nascar stopped using it in 2007 and F1 in 1992 said no more than 5mg/l of lead, and at this point they claim to use unleaded fuels.
BUT the big one is airline fuel. Every day constantly passing over all of us are thousands of airplanes spewing neurotoxic lead. And the crazy thing is lead in gasoline isn’t some magic thing; it’s an octane booster, an anti knocking agent. There are many other ways to achieve this, though ethanol is not suitable for planes. The reason planes still use lead is because of cost and the complexity of getting FAA approval of a potential alternative fuel. The incentive to do so is not that high because airplane fuel is ultimately a very small portion of total fuel sales.
A gigantic toxic nightmare above us and we tolerate it because it’s easy to just not think about it and it would potentially cost a little bit to not have fucking lead in our air
The latter half of this about aviation fuel went off the rails. Much of it is exaggerated or straight up inaccurate.
First off, lead is used in fuel to protect non-hardened valves used in old engines. It is not just an octane booster, and it’s not some giant conspiracy that’s keeping it in use. Modern engines don’t need it, but people aren’t running it just to be dicks. It’s part of the engine design in really old stuff, which is a ton of old aircraft that haven’t been rebuilt and updated to use unleaded fuel. Converting and certifying these old engines for UL is prohibitively expensive for many hobbyist pilots, but on the whole, leaded avgas has been being phased out for years, and it’s becoming less common every day.
Furthermore, airlines do not use leaded fuel because jet fuel does not contain lead. 100LL (100 octane low lead) avgas is used in small, older piston-engine aircraft, but that accounts for an incredibly tiny fraction of aviation fuel consumption, and there are unleaded avgas formulations available for modern piston engines that can use it. While leaded avgas does contribute to lead pollution, its effect is heavily concentrated around small airports with older private aircraft. Avgas is not a significant contributor to lead exposure for the average person.
Frankly, if hobbyist pilots can't afford to fly without poisoning the air around them, they shouldn't be flying.
Too bad I spent much of my childhood down the street from a private airstrip!
Damn so I guess chemtrails are real?
Jet fuel used in commercial planes does not contain lead. Unless you live around a heavily used general aviation airport, your exposure to lead from airplanes is minuscule.
Jet fuel does not contain lead and never did. Most commercial prop planes and helicopters are turbine engines, and use jet fuel.
It’s only the tiny percentage of “general aviation” flights for personal or hobbyist use that are stuck on a gas, most of them because they are decades old and no longer have a manufacturer who can update them
So the crazies and their chemtrail conspiracy were kind of correct?