How much air does a person breathe in a lifetime?

During a person’s life, he or she will breathe about 75 million gallons (284 million liters) of air. Every minute, the human body needs 2 gallons (7.5 liters) of air when lying down, 4 gallons (15 liters) when sitting, 6 gallons (23 liters) when walking, and 12 gallons (45 liters) or more when running.
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