What causes chronic obstructive pulmonary disease (COPD)?
Smoking is the leading cause of COPD, but it can also be caused by long-term exposure to certain gases and fumes. These factors can lead to airway inflammation, which can damage the lung and make it more difficult to breathe.
Author: Joanne Van der Velden
First answered: 18 Sep 2014
Last reviewed: 17 Oct 2018
Rating: 4.9/5 Votes: 485