* https://www.nbcnews.com/business/business-news/leaded-gas-wa...

And don't even get me started on DDT and teflon.

Thomas Midgley Jr.: Accidentally The Most Dangerous Man Who Ever Lived[0]

Leaded gas, CFCs, and accidentally created a machine that ended his own existence.[1]

[0]https://allthatsinteresting.com/thomas-midgley-jr [1]https://en.wikipedia.org/wiki/Thomas_Midgley_Jr.

2021 https://news.ycombinator.com/item?id=28500508

https://www.youtube.com/watch?v=IV3dnLzthDA

> This, my dear friend, is all I can at present recollect on the Subject. You will see by it, that the Opinion of this mischievous Effect from Lead, is at least above Sixty Years old; and you will observe with Concern how long a useful Truth may be known, and exist, before it is generally receiv'd and practis'd on.

> Benjamin Franklin, 1786

  Ah. We can't patent XYZ let's use ABC. 

https://youtu.be/IV3dnLzthDA?is=MorITIg_MvFrKtvR

> Two beliefs became entrenched:

1. that lead is natural to the human body, and

2. that a poisoning threshold for lead existed

Robert Kehoe, working for GM, was the chief advocate for leaded gasoline, and really the only person/lab doing research on lead until Clair Patterson stumbled into it while measuring the age of the earth. [0,1]

A modern equivalent might be if Facebook was the only organization researching social media's impact on society, while being able to set the paradigm/assumptions about said safety for half a century.

So even when Patterson's research was published in 1965, it took time to change the paradigm, and more time to phase out lead's use.

Should anyone want to read a narrative about the intertwined lives of Midgley, Patterson, Kehoe and lead, then this Mental Floss article is a good read. [2]

[0] https://en.wikipedia.org/wiki/Robert_A._Kehoe

[1] https://en.wikipedia.org/wiki/Clair_Patterson#Campaign_again...

[2] https://www.mentalfloss.com/science/environment/clair-patter...

Catalytic converters? Don't need 'em! There's no CO or unburnt fuel in the exhaust to catalyse because they run as lean as a vegan's dog!

CO2 emissions? Sure, but the stuff is getting flared off as waste at refineries anyway, and we're not going to stop making plastics and fertilisers any time soon, so may as well extract useful work from burning it!

We could have had incredibly clean cities everywhere by now, by simply keeping older cars on the road and adapting them to run on much cleaner safer fuel.

But there was a problem, an absolute bombshell of a problem. The fatal flaw that killed LPG as a road fuel.

It didn't sell new cars. It didn't sell anyone any debt.

So they came up with "scrappage schemes" where you'd get a couple of hundred quid for your old car, it would get destroyed, and then all you had to do was buy a nice new Cleaner Greener Diesel car instead, at some swingeing rate of interest (expect to pay well over twice the sticker price by the end of it - and no, you didn't get the Scrappage Scheme cash if you didn't take the finance package).

And you see how well that worked out.