Why is air important? A short introduction into plant respiration.
As everybody knows, plants produce oxygen (O2). This happens because the plant filters carbon dioxide (CO2) out of the air and removes the carbon (C) via photosynthesis, and then uses it for growth. The excess oxygen is returned to the surrounding air.
As light energy is required for this process, it only
takes place during the day. At night time, the plant reverses its metabolism, consumes oxygen, and produces CO2.
For the gardener, this means that the plant must always
have a sufficient supply of fresh air, which usually
contains enough of both gases.
If the plant can’t respire, it won’t grow either.