Throughout history, cities have ________
A) been self-sustaining in food production
B) been major sources of labor for the rural areas surrounding them
C) destroyed the rural areas surrounding them through conquest or politics
D) had disagreements with the rural areas surrounding them
E) drawn resources from surrounding agricultural areas
E
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A. A scooter traveling at 30 km/h. B. A half-as-massive scooter traveling at 60 km/h. C. both the same. D. need more information
Withdrawal of groundwater often causes subsidence, a situation where
A. Wells dry up B. Water quality and water tables fall C. Aquifer volume decreases sharply D. Porous rocks settle and ground level falls E. Withdrawals exceed recharge rates
Where is erosion concentrated along a meandering stream?
a.) at the unconsolidated point bars b.) on the inner banks of the meander loops c.) on the outer parts of the meander loops or bends d.) on the straight channel segments that connect the meander loops
The responsibility for complying with US federal air quality standards lies with
A) individuals. B) individual states. C) tri-state regions. D) the federal government.