Over time, users need more inhalants to get high. Once hooked, it's hard to quit. The more people use, the more damage they do to their bodies. A 4 out of 5 young people do not currently use marijuana. People who smoke regularly can build up a tolerance and need more to get high.
People can become dependent on marijuana.
Some marijuana smokers also become physically addicted. If a person is caught buying, selling, growing or using marijuana, the person could face fines, jail or prison. As few as five joints a week may expose a person to as many cancer-causing chemicals as smoking a pack of cigarettes every day for a week. By a large majority in the latest Zogby survey, Americans have made it clear that they do not believe marijuana should be legalized. According to the 25th annual Monitoring the Future Study the proportion of teen smokers continued to decline gradually in 1999.