asked 110k views
3 votes
What is the main source of carbon monoxide pollution?

electric power plants
residential furnaces
industrial factories
motor vehicle exhaust

2 Answers

5 votes
D is the correct answer
answered
User Ted Yu
by
8.3k points
3 votes
The answer would be D: motor vehicle exhaust;)
answered
User Dotcomly
by
8.3k points
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