At least what age should one be to consume cannabis?

two big things to consider:
1. legaslation isn't going to want to pass eomthing that says an uborn fetus can smoke pot, so they will want someting similiar to the alcohol laws like 18-21
2. peoples lives(most peoples lives) start to take off around 18 or so, getting out of highschool and going to college and/or getting a job, and gaining freedom and what not, that should be the age when you can decide what you put in your body and what you don't
like i'm not sure how this would work out but as soon as you enroll in a college or get a job you can then get you cannabis licsense and smoke the herb or something like that i don't know but it's a complicated issue

hmmm cigarettes are 18 so i'll go with 15/16 on cannabis :)

I think it would be best when you are mature enough to be responsible for what you do and take the correct safety measures to smoke for me it was just this year. I now that when I am high I do not want to do stupid shit, but for others aka my friends I do not think they will ever be mature enough, but they have grown up some. So whether that is when 14 or 45 then whatever, but I surely do not think little two year olds should be running around smoking a blunt or getting shotguns lol

When they are mature and responsible enough.

Responsibility is the key, I started when I was 13, and have seen no decrease in memory capability. I didn't have a good perception of consequences though, so I would have to say 15-16 years old, but there are always exceptions based on maturity and whatnot.

started when i was 15....

I think 12, as I started at 12.

Even though I started at 14 I voted for 16 since I think the added maturity that comes in those 2 years is important. I think It will be easier to talk to my kids and have them understand that there's responsibility that goes with having the privelege to toke.

Kids should not be smoking pot. I tried smoking when I was younger, but never really got into it. I became a smoker in college, where i also became a heavy drinker. But i was old enough and responsible enough to know when I could get high and when it was probably not the best idea. I didn't go to work high, and i only went to one class high regularly. (it was my film class). 18 is a good age. You can go to war you should be able to smoke some weed.

I believe that kids should be able to smoke pot once they are 18 years old, with age comes responsibility. The majority of kids that are 18 are going away to college and starting to live on their own, so why not let them be responsible for their choice of smoking marijuana? At age 18 most children have also stopped Puberty so there is no way that marijuana could alter them in any way.