In the U.S., ambient air concentrations of which of the following have declined the most since 1980 compared to its health and safety standard?
A) lead B) NO2 C) ozone D) SO2 E) CO
Answer: A
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If the production process at a factory is modified and less hazardous waste is produced, what kind of approach is being applied here?
What will be an ideal response?
The following population pyramid is indicative of
A) slow growth
B) a nation with large numbers of young children
C) rapid growth
D) a nation in Stage 2 of the Demographic Transition Model
E) a nation in Stage 1 of the Demographic Transition Model
Paleomagnetism measures the ________ and ________ of remnant magnetism in rocks. What will be an ideal response?
A strong trough in a Rossby wave occurs when the jet stream
A. does not bend but maintains a west to east flow. B. bends toward the poles. C. does not bend but maintains an east to west flow. D. bends away from the poles.