Leaded fuels were removed from production cars almost 50 years ago. Lead is a KNOWN health hazard to humans. Literally ZERO parts per million or billion is an acceptable level in blood. Children whose brains are still growing are more susceptible to stunted brain development, but adults are also at risk, who wants to say they got more senile just from car exhaust? Truly no one should be using leaded fuel any more. The remaining aviation industry is trying to lurch toward unleaded also. Drivers in leaded fuel cars, their families, and spectators, are putting themselves at risk to be breathing in leaded fuel fumes. It's time for all motor sports organizations to allow some rule changes to allow whatever technology is needed to keep performance, but change to use unleaded fuels. In fact for people born after 1980 or so, they have likely never even thought or heard of the dangers of lead (maybe the news about Flint water) and might not even know of how many race cars could be using it, and they are exposed to it but aren't even aware. For the health of drivers, families, corner workers, and everyone involved, we need to discontinue leaded fuel ASAP.
