Marijuana causes lung cancer?

For years anti Marijuana campaigns have been promoting that marijuana causes lung cancer. But this is in fact false. Many test have been run that prove that unlike nicotine, marijuana does not cause lung cancer. So the drug itself doesn't cause lung cancer but the smoke does. This can be said about any smoke that you inhale. Even if you did choose to keep smoking marijuana instead of eating it in foods or using a vaporizer, the risk isn't as high in marijuana as it is in smoking cigarettes. This is because marijuana users typically smoke much less often than tobacco smokers, and over time, inhale much less smoke. As a result, the risk of serious lung damage should be lower in marijuana smokers. In a large study done by the American Thoracic Society in 2006, They found that even the heavy marijuana smokers did not have increased risk of lung cancer.