Q. Did You Ever Smoke Pot? A. It’s Complicated.
nytimes.com
nytimes.com
At the end he does make a vague reference to pot killing brain cells, but I think the most recent science shows the opposite and that the whole "kills brain cells" thing was from government funded research a long time ago where they basically suffocated monkeys and the oxygen deprivation likely killed the brain cells.
So, the article seems a little disingenuous to me.
that should get you past the login-wall.
some lessons are to be learned on your own, and not to be told about.
I can understand the pressure to prevent the hard and most dangerous stuff, but with stuff like moderate alcohol and recreational drugs I think the risks don't great enough to warrant all the craziness.