AnswersMFISD ENVIRONMENTAL SYSTEMS B 22-23 CRUnit Test — Cumulative examQuestion 21
21
RCMultiple Choice

Unit Test — Cumulative exam

Question 21 • **MFISD ENVIRONMENTAL SYSTEMS B 22-23 CR

Which of the following is not a source of air pollution related to human activities?a.gasolineb.garbagec.forest firesd.radon

Answer
A
A
B
B
C
C
D
D
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