3. Dust, soot, asbestos, lead, and chromium are classified as ______________.
a. Carbon oxides
b. Liquid droplet
c. Suspended Particulate Matter
d. Volatile Organic Compounds
4. Which of the following does NOT belong to the group?
a. active and abandoned underground coal mine of factories
b. electric power plants
c. roadways
d. sewage treatment plants
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Explanation:
3. D Volatile Organic compound
4. D. Sewage treatment plants