Final answer:
COPD is a respiratory disease caused by nicotine and tobacco use, leading to permanent lung damage if not prevented by avoiding smoking.
Explanation:
Chronic obstructive pulmonary disease (COPD) is a respiratory disease caused by nicotine and tobacco use. Long-term exposure to cigarette smoke compounds like carbon monoxide and cyanide reduces lung elasticity, leading to COPD, which is preventable by avoiding smoking. COPD is characterized by permanent lung damage, making it difficult to exhale air fully.
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