Some studies have suggested there might be a link between air pollution and lung cancer. Researchers are trying to find out why this might be. If you breathe in certain particles from the air, they may damage the cells in your lungs. These damaged cells may become cancerous.

The main air pollutants are from motor vehicles, and include carbon monoxide, hydrocarbons, sulfur oxide and nitrogen oxide. However, if pollution does cause cancer, the risk is tiny compared to the risk from smoking. Studies have shown that air pollution may cause less than 1 in 100 cases of lung cancer.¹

This information is for educational use only, and is not a substitute for prompt professional medical advice. Readers should always consult a physician or other professional for advice and treatment. ©BMJ Publishing Group Limited 2008. All rights reserved.