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Why Are Airplanes Pressurized? – Cabin Pressure

airplanes oxygen masks, Airplanes Pressurized, Cabin Pressure, environmental control system, Airplane lack of oxygen

Airplanes cabin pressurization is the active pumping of air into an aircraft cabin to increase the air pressure within the cabin. Planes are pressurized as cruising altitudes are freezing and lack sufficient oxygen to breathe inside.