1) What is smog? (5 pts)
2) What is PM 2.5? What does 2.5 mean? Why is it bad? (10 pts)
3) What are the three groups of people most vulnerable to smog effects? (15 pts)
4) Other than the recommendations in the video (i.e. carpool, ride bus or light rail, walk or bike to work), can you think of something that you can do to contribute to cleaner air? (10 pts)

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