Which potential source of water pollution is a nonpoint source?
A. sewage treatment plant
B. electric power plant
C. active or inactive coal mine
D. logged forest
E. factory
Answer: D
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Two identical billiard balls roll toward each other with equal speeds. The net momentum of the two-ball system is
A. 10 kg?m/s. B. 0 kg?m/s. C. between 0 and 10 kg?m/s. D. not enough information
When regions are defined around places where its attributes or characteristics are very strong, but weaken or become less obvious with distance from those central areas, it is likely that this region exemplifies Meinig's
A) lifeworld. B) geographical imagination. C) core-periphery model. D) core-domain-sphere model. E) time-space convergence.
The overall regional life expectancy in sub-Saharan Africa is
A) 83 years B) 57 years C) 47 years D) 77 years E) 67 years
Creating a new wetland where one has been destroyed is referred to as
A. wetland rehabilitation B. bioremediation C. wetland reclamation D. wetland mitigation E. wetland restoration