Instructions: Choose One Answer from Each Pair of Selections

Q33: Which chemical destroys ozone in the stratosphere?<br>A)

Q34: Which condition would act to prevent a

Q35: Strong winds tend to lower pollutant concentrations

Q36: Prior to the 1950s, the smoke in

Q37: What compounds would you expect to find

Q39: Under which of the following conditions would

Q41: Rain with a pH of 4.5 would

Q42: Dry haze scatters more sunlight than wet

Q43: What compounds did the United States ban

Q66: How does Los Angeles-type smog differ from