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____ is defined as a chronic lung disease caused by cigarette smoking and is characterized by difficulty in breathing and shortness of breath.

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MrCatBoss

Answer:

Lung cancer because once you smoke, the toxic chemicals build up in each lung sack causing it to build up over a period of time and can have breathing difficulties and can lead up to cancer

Answer:

Lung cancer because once you smoke, the toxic chemicals build up in each lung sack causing it to build up over a period of time and can have breathing difficulties and can lead up to cancer

Explanation:

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