http://www.lungusa.org/site/pp.asp?c=dvLUK9O0E&b=35020
Chronic obstructive pulmonary disease (COPD) is a term referring to two lung diseases, chronic bronchitis and emphysema, that are characterized by obstruction to airflow that interferes with normal breathing. Both of these conditions frequently co-exist, hence physicians prefer the term COPD. This fact sheet provides information about COPD, including statistics, risk factors, symptoms, and treatment.