There are microorganisms in the world, which use organic molecules as the source of carbon and energy. Such microorganisms depend on organic matter for their survival. Organic molecules are used by microorganisms, just as food is used by humans for their growth and reproduction. Microorganisms ingest organic molecules, analyze the energy in them through various biochemical processes, and maintain life activities. They also take carbon sources to form their own substances, such as proteins and nucleic acids.

Microorganisms can exist in nature, or in soil, or in water. Their metabolic methods, although different, all revolve around the use of organic molecules. Either through aerobic respiration, with the power of oxygen, organic molecules are completely analyzed to obtain a large amount of energy; or through anaerobic fermentation, in the absence of nutrients, organic molecules must also be used to produce different products.

From this perspective, organic molecules are carbon sources and energy microorganisms, which play a crucial role in the ecological system. They can not only turn organic waste into useful, but also play a key role in the circulation of matter and energy, maintaining the balance of nature.