Leaching is a process in which a liquid solvent extracts and carries substances out of a solid material. This process is commonly used in various industries such as mining, agriculture, and environmental remediation to extract valuable minerals or nutrients from ores, soil, or waste materials. Leaching can be achieved through various methods such as heap leaching, in situ leaching, and bioleaching, depending on the specific material and desired outcome. Overall, leaching plays a crucial role in the extraction of resources and in the treatment of contaminated materials.