Those gases or particles that are pumped into the air to make it unclean are called ______.
primary air pollutant
secondary air pollutant
teritiary air pollutant
none of above
A
teritiary air pollutant
B
none of above
C
primary air pollutant
D
secondary air pollutant
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Solution
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Primary pollutants are those gases or particles that are pumped into the air to make it unclean. They include carbon monoxide from automobile (cars) exhausts and sulphur dioxide from the combustion of coal.
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