Question Description
I'm working on a health & medical question and need guidance to help me learn.
Chronic respiratory diseases (CRDs) are diseases of the airways and other structures of the lung. Some of the most common is a chronic obstructive pulmonary disease (COPD), asthma, and occupational lung diseases. Please give an overview of the risk factors of CRD and methods of prevention of CRD in KSA?

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Diss 331 SOI
Risk factors of CRD in KSA
Cigarette smoking, secondary tobacc...
