1.

Name one source of each of the following air pollutants :(a) Sulphur dioxide(b) nitrogen oxides(c) carbon monoxide(d) chlorofluorocarbons (CFCs)

Answer»

a. About 99% of the sulfur dioxide in air comes from human sources.

The main source of sulfur dioxide in the air is industrial activity that processes materials that contain sulfur, eg the generation ofelectricityfromcoal,oil orgasthat contains sulfur.

b. In areas of high motor vehicle traffic, such as in large cities, the amount ofnitrogen oxidesemitted into theatmosphereasair pollution can be significant.

c. Vehicle emissions

d. CFCsare used inairconditioners and refrigerators



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