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Answer:
Atelectasis occurs from a blocked airway (obstructive) or pressure from outside the lung (nonobstructive). General anesthesia is a common cause of atelectasis. It changes your regular pattern of breathing and affects the exchange of lung gases, which can cause the air sacs (alveoli) to deflate.
C. Thunderstorms (reason thunder stormy
Calcium carbonate is a major source
Climate is the average, year to year conditions of weather in an area