1) Chlorophyll-free chemosynthetics bacteria create organic matter due to the energy released during chemical oxidation reactions of various inorganic compounds: hydrogen, hydrogen sulfide, ammonia, etc.
2) Nitrogen bacteria play an important role in the nitrogen cycle.
3) Nitrogen bacteria absorb energy that would otherwise be lost to animals.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.