group I (Methanogens)

Group I, known as methanogens, are a specialized group of microorganisms that produce methane gas as a metabolic byproduct. They thrive in anaerobic (oxygen-free) environments like wetlands, the intestines of animals, and some deep-sea sediments. Methanogens play a crucial role in natural carbon cycles by breaking down organic matter and releasing methane, a potent greenhouse gas. They are unique in their ability to use carbon compounds, such as carbon dioxide or organic acids, and convert them into methane through a process called methanogenesis. Despite their small size, they have a significant impact on Earth's atmosphere and ecosystems.