This document provides an overview of different types of pollution, including air, water, noise, land, and radioactive pollution. For each type of pollution, it discusses the introduction, causes, effects, and ways to prevent it. The main types of pollution covered are air pollution from industries, automobiles, and gases; water pollution from industrial and organic wastes; noise pollution from traffic, construction, and industries; land pollution from mining, sewage, and garbage; and radioactive pollution from nuclear power plants, weapons, and waste. The effects of pollution include various diseases and health issues as well as impacts to the environment. Prevention methods focus on reducing pollution at the source and proper disposal and treatment of wastes.