1. Air Pollution G. Tyler Miller’s Living in the Environment 14th Edition Chapter 20 Shohail Motahir Choudhury
2. Structure and composition of the atmosphere Types and sources of outdoor air pollution Types, formation, and effects of smog Sources and effects of acid deposition Effects of air pollution Prevention and control of air pollution Key Topics Key Topics
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4. About 75–80% of the earth’s air mass is found in the troposphere , the atmospheric layer closest to the earth’s surface. This layer extends about 11 miles above sea level at the equator and about 5 miles above the poles. About 99% of the volume of air is made up of nitrogen (78%) and oxygen (21%) with the rest consisting of water vapor, argon, carbon dioxide, and traces of several other gases. This layer is also responsible for short-term weather and long-term climate . Atmosphere
