Toxicology, the study of the adverse effects of chemicals on living organisms, is intrinsically linked to MARPOL as the convention targets the reduction of harmful substances released from ships. MARPOL addresses pollutants like oil, hazardous chemicals, sewage, garbage, and air emissions, each of which can have toxicological impacts on marine life and human health. By regulating the discharge of these substances, MARPOL plays a critical role in reducing marine toxicity.