Betaproteobacteria is a class of bacteria within the phylum Proteobacteria. They are primarily found in various environments, including soil, water, and the human body. This group is known for its diverse metabolic capabilities, allowing them to thrive in different ecological niches. Many Betaproteobacteria are involved in important processes such as nitrogen cycling, which is essential for soil fertility. Some species can also be pathogenic, causing diseases in plants and animals. Overall, this class plays a significant role in both environmental and health-related contexts.