Geochemical cycles are natural processes that recycle essential elements and compounds through the Earth's systems, including the atmosphere, hydrosphere, lithosphere, and biosphere. These cycles ensure that vital nutrients, such as carbon, nitrogen, and phosphorus, are continuously available for living organisms, supporting life on Earth. Each cycle involves various stages, including the movement of elements through different forms and locations. For example, in the carbon cycle, carbon dioxide is absorbed by plants during photosynthesis, then released back into the atmosphere through respiration and decomposition. Understanding these cycles is crucial for managing ecosystems and addressing environmental issues.