- Microorganisms help clean the environment by breaking down organic waste. - Lactobacillus bacteria convert milk into curd. - Bacteria aid in making cheese, pickles, and fermented foods like idlis and dosa batter. - Yeast is used in baking bread, pastries, and cakes. - Microorganisms produce alcohol, wine, and vinegar on a large scale. - Antibiotics and vaccines are derived from bacteria and fungi. - Some bacteria fix atmospheric nitrogen, enriching soil fertility. - Intestinal bacteria aid in digestion. - Bacteria decompose sewage waste, cleaning water.