1. I don't think weed is "harmless"
2. I believe that it isn't as risky as alcohol or ciggarettes
3. You article doesn't support the idea that cannabis is just as risky as using alcohol or cigarretes.
I don't know how you could come to that conclusion based on that one article.
I believe there are leprechauns standing under my desk and they are telling me to drink up and get drunk on campus for St Patrick's Week. (This is not a pug for Green Week, which I believe is next week at Monash Clayton).
Just because you believe something to be true, does not mean it is true. Since you are asserting that cannabis "isn't as risky as alcohol or ciggarettes",
you are the person who must provide the evidence to show that what you are attempting to assert is true. I shouldn't have to go on the Monash library service and waste MY internet allowance just for your benefit.
What I have asserted is that cannabis consumption is a known risk factor for schizophrenia and have demonstrated that there is scientific evidence to back this assertion up.