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(1)Prairie Dogg is made by placing high and low cars on either side of an oyster when building a house
(2)And the wind goes into the lower hole and comes out high
(3)In the middle, the air escapes from the living space to the ventilation hole
(4)Complete ventilation system completed by Bernoulli equation, which speeds up fluid flow from large to small spaces
(5)Carbon dioxide, which is heavier than air, builds up underneath the cave
(6)The ventilation system keeps replacing it with fresh oxygen, allowing for temperature and humidity control
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