Chemical leaching is a process where soluble substances are removed from solid materials through the use of chemicals. This technique is commonly used in mining to extract valuable metals, such as gold and copper, from ore. The chemicals, often acids or bases, dissolve the target minerals, allowing them to be separated from the waste material. In agriculture, chemical leaching can refer to the movement of nutrients or contaminants through soil and into groundwater. This can occur when excess fertilizers or pesticides are applied, leading to potential environmental issues. Monitoring and managing leaching is important to protect water quality and maintain healthy ecosystems.