As one of the leading causes of mortality worldwide, chronic obstructive pulmonary disease (COPD) is an area with a very broad reach that is a major concern for many in the respiratory field. A comprehensive overview of this serious disease is provided in this Monograph, which begins with chapters covering symptoms, diagnosis and assessment of severity; moves on to oxidative stress, smoking cessation, antibiotics and oxygen therapy; and closes with a discussion about socioeconomic burden, as well as future research in COPD.