Chemical weathering is a process that breaks down rocks and minerals through chemical reactions. This occurs when minerals react with water, acids, or gases in the environment, leading to changes in their composition. For example, when carbon dioxide in the atmosphere dissolves in rainwater, it forms carbonic acid, which can dissolve limestone and other carbonate rocks. This type of weathering is important for soil formation and nutrient cycling. It helps release essential minerals, such as potassium and calcium, which are vital for plant growth. Over time, chemical weathering contributes to the landscape's evolution and the development of various ecosystems.