Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic compounds, such as hydrogen sulfide or ammonia. Unlike plants, they do not rely on sunlight for energy; instead, they use chemical reactions involving minerals to fuel their growth and metabolism. This process is essential in various ecosystems, particularly in extreme environments like deep-sea hydrothermal vents. These organisms play a crucial role in nutrient cycling and can be found in diverse habitats, including soil, water, and even the human gut. Chemolithotrophs contribute to the breakdown of minerals and the recycling of elements like nitrogen and sulfur, supporting overall ecosystem health and stability.