The balance existing between the various elements of the environment is precise and established by the discretion of the Almighty Creator. "Everything has a measure," and this can be observed in many things that happen around us. In the carbon cycle, the plant absorbs carbon dioxide from the air and uses it to make the food it needs, and in this process it releases oxygen gas as a by-product. The consumer elements use the oxygen gas in their vital processes and in obtaining the necessary energy, and in turn release carbon dioxide gas into the air, which is then used by the production elements again.