Yeah, if we knew then what we know now.... wisdom of youth.In the 70s I heard the best thing a person can do to help the planet was to not have children. More people need more food and resources.
If everyone in the world was to live like middle-class Americans we would need the resources of 7 earths.

Did anyone else hear Elon Musk?
"Doing my best to help the underpopulation crisis. A collapsing birth rate is the biggest danger civilization faces by far."
I'll be sure to not buy a Tesla or stock.