There are various microbes which are beneficial to us. Decomposers like bacteria, fungi act upon dead organisms and convert into simpler forms, thus help in cleaning our environment. Some antibiotics are manufactured from certain microbes. They are used in baking and alcohol industry. Some microbes like cyanobacteria, rhizobium helps in nitrogen fixation thus increasing the fertility of the soil. Some microbes are used in leather, food processing industry. Some are used in the manufacture of enzymes, hormones etc.

So microbes are an essential part of our life.