Anyone who thinks polls are a good source of scientific research.. well.. yeah. Polls are nothing but a min and max game. Do it long or short enough in a specific location, and you can show whatever "conclusion" you want. A few thousand people in a city doesn't nearly match up to the entirety of the world. Their terms and irrelevance are laughable. Someone who smokes hashish every two minutes for a month is a lot different than someone who smokes a low-potent blunt once a month all their life.
Cancer is caused by, very generally, stress on cells inducing a change in some way which could eventually lead to a spread of cancer among other things (benign and malignant). Breathing in toxic particles is pretty stressful on your lungs. Breathe in just about any noxious chemicals frequent and long enough and it's going to cause cancer. Asbestos used to be considered safe and used everywhere. Products using Vinyl Chloride wasn't thought of as toxic until well after factory workers and consumers discovered it by personal experience.
Here is data I would find much more reliable and believable than some nobody who's studied a subject for half their life and came up with a crummy poll.
http://www.cnn.com/HEALTH/9808/18/marijuana.cancer/And, Magickz, from the way you conducted yourself in Zul'Gurrub on Ventrillo when I was in the guild.. whatever Jagor said, you had coming. But I guess our opinions are "worthless" since you're about as ignorant as any teenager who thinks impersonal, biased, and predictable text on a forum is annoying enough for noting. You probably can't help but check the page every day and respond even after you said you're not going to come back. Maybe even use another user account if we're lucky.
I believe with you 100% except that weed causes cancer
I guess problematic sentence structures and poor grammar are the only things I find annoying. That and "Beautiful Girls" by Sean Kingston.