This document discusses various environmental issues including different types of pollution such as air, water, soil, and noise pollution. It provides details on major air pollutants like carbon monoxide, sulfur dioxide, nitrogen dioxide, particulate matter, and ground level ozone. The causes and effects of each pollutant are described. The document also discusses different types of smog, methods to control air and particulate pollution, and defines other environmental issues like eutrophication, biomagnification, and acid rain.