Ever since I was a kid I always wondered how people are not suffocating from staying in their house. Like if all windows are closed how does air get in? Wouldn’t we just breath up all the available air in a matter of hours and die? Same goes for cars too. If I’m on a long road trip and the windows are closed how am I still alive?
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If all the same air stayed trapped in a car for a long time it’s possible you could suffocate. However, the ac system takes some amount of outside air and your car isn’t perfectly sealed so it’s not a big problem. The answer’s pretty much the same for a house.
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