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1)Please explain what particulate matter is. Define it and give examples in your explanation. What are     the critical factors in determining acceptable exposure of particulate matter? You may use our class notes and the Internet to help you answer these questions. Please remember to cite your sources.

Confused About Dust, Particulates and Fumes in the Workplace? Part 1: Dust and Particulate Matter

https://alen.com/pages/everything-you-need-to-know-about-airborne-particulate-matter

2)Please explain what particulate matter is. Define it and give examples in your explanation. What are the critical factors in determining acceptable exposure of particulate matter? You may use our class notes and the Internet to help you answer these questions. Please remember to cite your sources.