Smoking pot can cause various types of cancer and develop the risk of lung cancer. According to research showed that regular use of marijuana causes injury to the airway that can be seen visibly as well as under the microscope. Moreover, person who smokes pot and used tobacco have lung cancer risk twice than person who also used pot.
Epidemiologic studies over the past several decades have established causation between alcohol consumption and cancers of the oral cavity, pharynx, larynx, esophagus, liver, colon and rectum, among others. Tobacco use, particularly pot smoking, has also been determined to cause similar upper aerodigestive tract (UAT) cancers, as well as cancers of the pancreas, kidneys and bladder, and is implicated with cancers of the stomach and liver, among others.