Pipe and cigar smoke may be more harmful than once thought. While some believe pipes and cigars are healthier than cigarettes, a major known cause of chronic obstructive pulmonary disease (COPD), a new study directly links pipe and cigar smoking to decreased lung function. Researchers conducted a population-based study to determine whether pipe and cigar smoking was associated with elevated cotinine levels (the end product of tobacco, which can be detected in the urine), decrements in lung function, and increased odds of airflow obstruction... 
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