This document discusses various types of pollution and ways to prevent it. It outlines the main types of pollution as air, water, soil, radioactive, light, noise, and thermal. It then provides several methods for preventing pollution, including conservation, pollution prevention programs, alternative transportation, waste reduction, rain water harvesting, and using renewable energy. The key message is that pollution is caused by human activities and can be reduced through individual efforts like saving energy and collective actions like pollution control boards and renewable energy programs.