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The author sounds a bit confused. Jets, which include virtually all commercial planes, run on jet fuel, which does not contain lead: https://en.wikipedia.org/wiki/Jet_fuel
To expand upon this, jet engines do not use spark plugs; they use igniters, along with some sort of motor, to start the engine. Diesel engines don't use spark plugs either. Some diesel engines have glow plugs, to help start the engine, especially when the engine is cold.
Leaded gas is dirty. Even with the lead scavengers they add to the fuel, the lead deposits build up on spark plugs, small passages, sensors, etc. 100LL has as much lead as automotive leaded gasoline from 1973 did.
"For the study, the team used publicly available U.S. data on childhood blood-lead levels Trusted Source, leaded gas use, and population statistics to determine the likely lifelong burden of lead exposure that every U.S. adult alive in 2015 now carries. From there, the researchers estimated the impact of lead on intelligence by calculating the reduction in IQ points that exposure to leaded gas likely caused."
Maybe, maybe not. On the surface, this looks like another attempt to fit a correlation into a causation for a pet cause. That it comes from Florida is now another reason to question the veracity.
A main issue is that the study is excessively broad and doesn't take into account other parameters. The smog in some cities during the 1960s was bad. It wasn't just auto exhaust, and auto exhaust back then was more likely to contain carbon monoxide. Low levels of carbon monoxide exposure on a constant basis could be a competing factor. City kids vs. country kids? Kids living rurally should have shown up as outliers to the trends. I don't discount the idea entirely, but I don't see the study as particularly meaningful or insightful.
"For the study, the team used publicly available U.S. data on childhood blood-lead levels Trusted Source, leaded gas use, and population statistics to determine the likely lifelong burden of lead exposure that every U.S. adult alive in 2015 now carries. From there, the researchers estimated the impact of lead on intelligence by calculating the reduction in IQ points that exposure to leaded gas likely caused."
Maybe, maybe not. On the surface, this looks like another attempt to fit a correlation into a causation for a pet cause. That it comes from Florida is now another reason to question the veracity.
A main issue is that the study is excessively broad and doesn't take into account other parameters. The smog in some cities during the 1960s was bad. It wasn't just auto exhaust, and auto exhaust back then was more likely to contain carbon monoxide. Low levels of carbon monoxide exposure on a constant basis could be a competing factor. City kids vs. country kids? Kids living rurally should have shown up as outliers to the trends. I don't discount the idea entirely, but I don't see the study as particularly meaningful or insightful.
Having a parent who smoked in the automobile with the windows shut and the ventilation fan turned off (A surprising number of smokers seemed to prefer this) would expose you to a significant amount of CO.
I love it when people think "smart" means "better" like they are unaware of the existence of intelligent con men, politicians, lawyers and serial killers. Smart clearly doesn't mean better or even decent.
Prudent, kind, generous people with integrity make a society better. The people in my aforementioned list always lack those qualities.
Kids at certain ages can be given specific mind games that could noticeably improve not only their intelligence but their memory as well.
Maybe, maybe not. On the surface, this looks like another attempt to fit a correlation into a causation for a pet cause. That it comes from Florida is now another reason to question the veracity.
Quoted for Truth.
Literally impossible to pin IQ loss on any one thing.
Without getting Into the actual data about how ambient Pb levels have fallen to essentially zero since Pb was removed from fuel & paiint by 1975 and that the toxic blood levels of Pb are thoroughly unknown (fed limits are 100% arbitrary) the most important point the authors seem to be missing is that for IQ tests, a standard deviation is DEFINED as 10 pts....A change of 6pts is therefore statistically the same as NO CHANGE.
OK OK. Break it up. Back in your computers, folks. Nothing to see here.
Having a parent who smoked in the automobile with the windows shut and the ventilation fan turned off (A surprising number of smokers seemed to prefer this) would expose you to a significant amount of CO.
I remember that well. Both my parents smoked. Made me so sick, and, no, it was not motion sickness. Same when smoking was allowed in airplanes. Now I am no longer nauseated when flying.
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