respiratory system cigarette smoking Smoking: Effects, Risks, Diseases, Quitting & Solutions Smoker's lungs vs. healthy lungs:

Dozens of these harmful chemicals are carcinogens, or cancer-causing substances, most of which come from the tobacco leaves themselves, rather than the additives, according to the ACS

It concluded that cigarette smoking is the most likely cause of the worldwide increase in deaths from lung cancer, and that the habit probably also contributed to the development of coronary heart disease, chronic bronchitis, and lesser diseases

International Journal of Radiation Oncology, Biology, Physics

A few changes to your lifestyle can help reduce the risk of complications

All together, this generates more than a million tonnes of plastic waste