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Chronic Obstructive Pulmonary Disease (COPD) is a progressive lung disease often caused by smoking or long-term exposure to air pollution. Early signs include chronic cough, increased mucus production, frequent chest infections, and breathlessness during daily activities. Early diagnosis and proper management can slow disease progression and improve lung function. Lifestyle changes such as quitting smoking, regular exercise, and medication adherence play a crucial role in controlling COPD. Seeking medical advice at the first sign of symptoms can prevent serious complications.