Q Question 1 1 / 1 pts I watched all video lectures and clips and read the assigned materials in this lesson. IncorrectQuestion 2 0 / 1 pts Using brine on roadways instead of sand (both of which are aimed at reducing crashes on icy roads) is an example of a strategy to prevent which air quality hazard? IncorrectQuestion 3 0 / 1 pts Which of these is a 'physical' (as opposed to chemical) environmental hazard? Question 4 1 / 1 pts Requiring smog checks and implementing programs to reduce car idling are primarily aimed at reducing ___ levels in the air.

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