Contaminated materials refer to substances that have been polluted or tainted by harmful chemicals, biological agents, or other hazardous substances. These materials can include soil, water, air, and waste products that pose risks to human health and the environment. Common sources of contamination include industrial activities, agricultural practices, and improper waste disposal. Proper management of contaminated materials is essential to prevent further pollution and protect ecosystems. Techniques such as remediation, decontamination, and hazardous waste disposal are employed to clean up affected areas. Regulatory agencies often set guidelines to ensure safe handling and treatment of these materials to minimize their impact.