You have been hired by a rapidly growing small city to improve the air quality, which has deteriorated in the past 10 years. What would be a logical action to take?
A) decrease the amount of CFCs used locally
B) remove the hydroelectric dam on the nearby river
C) improve transportation options, including carpool lanes, buses, and light rail
D) move or close the cattle feedlots located along the nearby river
E) try to negotiate with the large city downwind whose factories produce large amounts of pollution
Answer: C
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Light from a candle has a certain brightness 1 m away. At 2 m away its brightness is
A. one-quarter as much. B. half as much. C. practically the same. D. uncertain.
Most of the better known composite volcanoes on Earth are ________.
A. in the circum-Pacific belt B. in the Mediterranean belt C. in the mid-ocean ridge system D. All the choices are correct. E. All the choices are correct, except in the Mediterranean belt.
Which two climates are found on opposite coasts of each land mass in approximately the same latitude?
a. tropical rainforest and Mediterranean b. marine west coast and Mediterranean c. low latitude desert and low latitude steppe d. Mediterranean and humid subtropical e. marine west coast and subarctic
Which example illustrates a negative feedback loop?
A. melting polar ice B. exponential population growth C. a thermostat maintaining a certain temperature in your house D. the greenhouse effect E. vegetation removed from a stream valley