ENVIRSC 1C03 Lecture Notes - Lecture 3: Dobson Unit, Greenhouse Gas, Ozone Depletion

• School: McMaster University
• Department: Environmental Science
• Course: ENVIRSC 1C03
• Professor: Luc Bernier

Document Summary

Pollution is the human-caused addition of any material or heated energy in amounts that cause. "undesired alterations" to the environment and is the by-product of economic and social activity. An air pollutant is a gas, aerosol, or particulate added to the atmosphere that can have harmful e ects on humans, the environment or climate. Three factors determine the level of air pollution: the amount of pollutants entering the air, the amount of space into which the pollutants are dispersed, and, the mechanisms that remove the pollutants from the air. Primary pollutants are the direct products of either combustion or evaporation and are harmful to the environment in general and more speci cally to humans. When primary pollutants are emitted in the troposphere, they can be in a form that is directly harmful or they can react to form other harmful substances.