The air recirculation button in your car is one of the most commonly used—but least understood—features on the dashboard. Identified by an icon of a car with a circular arrow inside, this button tells your vehicle’s climate control system to stop pulling air from outside and instead reuse the

air already inside the cabin. While it may seem like a minor setting, it plays a surprisingly important role in comfort, efficiency, and even air quality, depending on when and how you use it.

AC system, which can slightly improve fuel efficiency. It’s also helpful in traffic jams, tunnels, or polluted areas, since it prevents exhaust fumes, smoke, and unpleasant odors from entering the vehicle. Read more below