Respiratory protection is a common form of PPE used in the United States. Compare and contrast the different categories of respirators. Discuss the different situations when respirators would be required. Include a discussion of the limitations of each type of respirator. Support your conclusion with at least one reference. Your essay should be at least 200 words in length and include an introduction, a body, and a conclusion. You are required to use at least your textbook (Safety Engineering by John W. Mroszczyk.4th Edition) as source material for your response. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying in-text citations.