One of the dangers of tobacco use is damage to the lungs after developing emphysema, which is an obstructive lung disease.

COPD or chronic obstructive pulmonary disease, is the name for long-term lung disease which includes both chronic bronchitis and emphysema the risk of getting COPD goes up the more you smoke and the longer you smoke. Smoking is by far the most common cause of COPD. 

I hope this helps you:)

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