Outdoor air pollution is reduced when ____.
A. buildings slow wind speed and reduce dilution of pollutants
B. hills and mountains reduce the flow of air in valleys
C. high temperatures promote formation of photochemical smog
D. chemical reactions produce acidic precipitation which falls out of the atmosphere
E. temperature inversions form over cities surrounded by mountains
Answer: D
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A fundamental geologic principle holding that sedimentary rocks in a vertical sequence formed
one on top of the other so that the oldest layer is at the bottom whereas the youngest is at the top:a. principle of cross-cutting relationships b. principle of original horizontality c. principle of inclusions d. principle of lateral continuity e. principle of super position
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Of the following Caribbean countries, which one is the farthest north?
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