Smoking is the primary risk factor in most cases of chronic obstructive pulmonary disease (COPD).

Name: Smoking is the primary risk factor in most cases of chronic obstructive pulmonary disease (COPD).
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Smoking is responsible for approximately 90% of COPD cases, making it the primary risk factor. Other factors such as air pollution, genetics, and occupational exposure can also contribute to the development of COPD, but smoking is the most significant one.

Smoking Is the Primary Risk Factor in Most Cases of Chronic