Useful Bacteria Useful Bacteria Bacteria are often associated with harmful infections and diseases, but not all bacteria are bad. In fact, there are many useful bacteria that play a crucial role in our lives and the environment. 1. Probiotics Probiotics are beneficial bacteria that help maintain a healthy digestive system. They can be found in certain foods like yogurt, kefir, and sauerkraut, or taken as supplements. Probiotics promote a balance of bacteria in the gut, aid in digestion, and support the immune system. 2. Nitrogen-Fixing Bacteria Nitrogen-fixing bacteria have the remarkable ability to convert atmospheric nitrogen into a form that plants can use. These bacteria form a symbiotic relationship with certain plants, such as legumes, and help enhance soil fertility. By fixing nitrogen, these bacteria play a vital role in agricultural practices and contribute to sustainable farming. 3. Decomposers Decomposer bacteria break down organic matter, such a...