Actually no it doesn't kill brain cells. My psychology professor explained to our class the effects of weed on the human body just three weeks ago. What happens is it coats the brain cells in a thick shell which blocks electrical signals.It doesn't kill it though.
When a person becomes completely sober the thick shell disappears. Depending on how much weed a person smoked, and for how long will determine how long it will take for that shell to dissipate.So weed doesn't kill brain cells, it rather encapsulates them and renders them useless until they are freed up. This is why some people that used to smoke weed have a mentality from a time before they started.
No. There is no study indicating this. There is no mechanism suggested that would make this possible.
However, smoking anything is terrible for your lungs. It does kill your lung tissue.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.