This document discusses different types of environmental pollution including water, air, land, and noise pollution. It provides details on the causes, sources, and effects of each type of pollution. The key points are: - Environmental pollution is any undesirable change in the environment that harms life or property. The four main types discussed are water, air, land, and noise pollution. - Water pollution comes from municipal and industrial waste, chemicals from agriculture, and thermal pollution from power plants. Air pollution is caused by emissions from fossil fuel combustion, vehicles, and industry. Land pollution results from construction, farming, and dumping of industrial and domestic waste. Noise pollution comes from transportation, construction, and industrial activities. -