Which of the following is a positive effect that cities have on the environment?
A) Air pollution from the Midwest and "Rustbelt" states is exported to the northeastern United States and Canada.
B) Garbage from New York is distributed to Kentucky to fill up abandoned mines.
C) Cities give people places to live with smaller land use.
D) Concentrating people in cities contains water and air pollutants, which are removed by greenbelts.
Answer: C) Cities give people places to live with smaller land use.
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Using the Rating Curve in Figure 43-1, estimate the gage height (to 1 decimal place) when Cache Creek has a discharge of
(a) 40 cms: __________ meters (b) 250 cms: __________ meters
The earliest spatial expansion of Islam (i.e., in the seventh century A.D.) is best characterized as an example of ________.
A. relocation diffusion B. cascade diffusion C. hierarchical diffusion D. expansion diffusion
Much more original forest remains in the U.S. than in Canada, especially in the north and west
Indicate whether the statement is true or false.
Which of these numbered features is on the continental slope?
A. 1 B. 2 C. 3 D. 4 E. None of these choices are correct.