This document discusses three types of pollution: air, water, and soil. It provides details on various air pollutants like carbon monoxide, nitrogen oxides, and sulfur dioxides. It also discusses greenhouse gases and their role in the greenhouse effect. For water pollution, it lists pollutants like sewage, chemicals, and how they affect dissolved oxygen levels. Soil pollution is addressed as well, outlining pollutants such as nitrogen, phosphorus, pesticides and their negative impacts.