Vol. 5, Issue 1, Part A (2023)

Microorganisms can be seen with the help of microscope. Microorganisms include Bacteria, Archaea, Viruses, Fungi, Protist, Protozoa and algae etc. Microbes are omnipresent in the biosphere and their presence invariably affects the environment in which they grow. The effects of microbes on the environment can be beneficial or harmful or in apparent with regards to human measure or observation. The most significant effect of microbes on the Earth is their ability to recycle the primary elements that make up all living systems, especially carbon, oxygen, nitrogen. This article mainly focuses on beneficial and harmful impact of microbes on environment and their role to maintain quality, health and sustainability of environment. Some microorganisms are beneficial while some are non-beneficial for human beings. Some microbes spread different disease in the world and make the world polluted but some clean the pollution of the World.