Cigarettes release over 5,000 chemicals when burnt and at least 70 of these cause cancer. Build-up of DNA damage from the chemicals in cigarettes lead to cancer| Cancer Research UK
Passive smoking means breathing in other people’s tobacco smoke. All passive smoking is unsafe. Find out more from Cancer Research UK.| Cancer Research UK
Chemicals in cigarette smoke cause at least 16 types of cancer, including lung cancer. Stopping smoking completely is the best thing you can do for your health.| Cancer Research UK