This document defines and discusses five main types of pollution: air, water, noise, land, and radioactive pollution. For each type of pollution, it provides an introduction, describes the causes and effects, and suggests methods for prevention. The key points made are that pollution contaminates the environment and makes it unfit for use, the five main types are air, water, noise, land and radioactive, and for each the causes, effects and prevention methods are outlined to raise awareness about environmental protection.