Sources of Atmospheric Pollutants: Answer Key

Using the bar graph of atmospheric pollutants complete the following chart.

Pollutant Greatest ContributorLeast Contributor
carbon monoxide
CO 		transportelectricity
oxides of nitrogen
NOx		transportbuildings
volatile organic compounds
VOC		transportelectricity
sulphur dioxide
SO2		electricity*buildings
particles
10 micron		transportindustry
particles
2.5 micron		transportelectricity
carbon dioxide
CO2		electricity*buildings
* From fossil-fuel burning plants only. Hydro and nuclear electric plants produce zero emissions.

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