This document discusses water pollution. It begins by explaining the importance of water and how rain is the major source of pure water. However, as rain reaches the earth's surface and bodies of water, it can become polluted by dissolving harmful gases, dust, smoke particles and germs. Further pollution occurs from human activities like bathing, washing, dumping domestic and industrial waste, and chemicals from farms and factories. This reduces oxygen in the water and can infect and kill aquatic plants and animals. Polluted water used for drinking or irrigation can spread diseases. Steps are outlined to prevent water pollution from various sources and raise awareness that it is everyone's responsibility to keep the environment clean.