Contamination cleanup refers to the process of removing harmful substances from an environment, such as soil, water, or air. This is often necessary after incidents like chemical spills, industrial accidents, or natural disasters. The goal is to restore the area to a safe condition for humans, wildlife, and the ecosystem. Various methods are used in contamination cleanup, including bioremediation, which uses microorganisms to break down pollutants, and excavation, where contaminated soil is physically removed. Cleanup efforts may also involve chemical treatments to neutralize hazardous materials, ensuring that the environment is safe for future use.