This document discusses five types of pollution: air, water, noise, land, and radioactive. For each type of pollution, it provides definitions and overview, causes, effects, and ways to prevent or reduce pollution. The major causes of pollution discussed include industries, vehicles, waste, mining, nuclear power and weapons. Effects described are negative health impacts on humans, animals and plants. Prevention methods include use of cleaner fuels, proper waste disposal, reducing noise, replanting trees, and alternatives to nuclear energy and mining.