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Why is smoking bad for your lungs?

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Tobacco smoke can narrow and inflame your airways and make it harder to breathe. It often irritates your lungs and can cause a nagging cough. Over time, the smoke destroys lung tissue and might cause cancer. It’s the No. 1 cause of lung cancer and COPD, a disease that slowly destroys the tiny sacs in your lungs (alveoli) that transfer oxygen to your blood.

Reviewed by Minesh Khatri on May 15, 2020
Reviewed by Minesh Khatri on May 15, 2020

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What is the pleura in the lungs?

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