All living beings breathe in oxygen but the percentage of oxygen doesn’t. Decrease. Why
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Bởi vì vào ban ngày thực vật sẽ quang hợp lấy co2 tạo o2 bù lại lượng o2 đã mất
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he percentage of oxygen in the air does not decrease because it has been more or less balanced by the oxygen production due to the process of photosynthesis.
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