Home > Lung Disease > Learn about COPD Get the Flash Player to see this player. Rate: (Click the stars to rate) Published on Aug 11, 2009 by NationalJewishHealth, Views: 5410 Learn about COPD. COPD is usually caused by longterm smoking. The most common symptom of COPD is shortness of breath. Excess mucous production and cough are also common. COPD is inclusive of chronic bronchitis, and emphysema.