link :
TheConversation.Com
… and there was a very interesting episode on NPR radio about a great man in this story :
Clair Cameron Patterson
https://en.m.wikipedia.org/wiki/Clair_Cameron_Patterson
He Triumphs against corporations’ greed in the end 👍.
ideally, I was hoping (but I failed) to put the spotlight on the positives :
1- Now we don’t have lead in gasoline (except for airplane & sport races) ,
2- Put the emphasis on one hero on this story which I name in the body of the post,
3- See how people can triumph over greed.