Smoking is the main cause of lung cancer, responsible for 85% of cases.
If you are a smoker, you are exposed to over 60 different toxic substances, which are known to be carcinogenic (produces cancer).
Cigarette tobacco smoke is the main cause, but other tobacco products may increase the risk of lung cancer, as well as mouth cancer or oesophageal cancer. These include cigars, pipe tobacco, chewing tobacco and snuff (powdered tobacco).
Smoking cannabis also holds an increased risk of lung cancer, as typically cannabis is mixed with tobacco, but smoke may be more deeply inhaled and held in the lungs for longer.
Unfortunately, even if you don’t smoke yourself but you are continually exposed to cigarette smoke as a “passive smoker” your risk of lung cancer could be increased by as much as 25%.