Hello I just moved in with some new people who, I have found out, smoke a lot of weed. Now the internet is full of info about how passive smoking can explain a positive drug test but this is not what i'm interested in. I'm afraid I could get dumber from the passive smoke inhalation. If that's the case I need to get it to stop. I spend 10 hrs a day doing mathematics and getting good at it and I don't want to see it go to waste. What would you do?