This document defines and discusses different types of environmental pollution. It defines environmental pollution as any undesirable change in the air, water, or soil caused by human or natural activities that can harm life or property. The document outlines four main types of pollution: water pollution, land pollution, air pollution, and noise pollution. It provides more details on water pollution and air pollution, defining water pollution as changes to water quality making it unsuitable for its intended use, and air pollution as the introduction of harmful substances into the atmosphere.