<human>: Can you summarize the given text in a few sentences?

I'm wondering specifically about South America. 

I have a friend that's from Peru and he frowns upon Marijuana. He is a certified doctor in Peru, Spain, and the United States. One of the things that he said that really caught my attention is that it effects babies developement pre-Zygote. So basically he states that if you smoke weed it will affect your sperm and cause development issues if you happen to get someone pregnant. My friend has been drinking alcohol since he was 12 and when I told him alcohol kills brain cells and that's part of the reason why you cant drink until you are 21 in the states, he said that the amount of cells that it kills is really small. I had another friend from Peru who never had a reason to not smoke marijuana he just perceived it as bad, but again he also started drinking from a young age. I have another friend from Chile and refuses to try it for no reason, but started drinking at a young age. I have some friends from Argentina & Uruguay and all of them smoke and don't think its bad. 

How does your country see Marijuana use and how does it compair to other drugs?
<bot>: Friends from Peru & Chile see marijuana as a horrible thing but start drinking at a young age, friends from a different part of South America (Argentina & Uruguay) dont see anything wrong with it.