Which characteristic is a disadvantage of hydroelectric plants?
A. low net energy
B. large land disturbance
C. little untapped potential
D. high-cost electricity
E. high emissions of carbon dioxide
Answer: B
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Assume that these categories represent a progression of degradation through time. In other words, if left unchecked, lightly degraded soil progresses into moderately degraded soil and so forth. Which continent poses the greatest concern for future loss of agricultural productivity?
a. South America b. North America c. Africa d. Europe e. Asia
The "ozone hole" that causes concern among scientists and the public is an ozone depletion in the
A. Tropopause B. Thermosphere C. Troposphere D. Mesosphere E. Stratosphere
One major educational effort in developing countries is an effort to
A) emphasize environmental policy by moving classrooms outdoors. B) teach foreign languages in schools. C) increase the number of girls in schools. D) encourage better nutrition by teaching children how to raise chickens.
Most of the damage from Hurricane Hugo was associated with:
a. wind damage to buildings in the storm's path b. flooding of coastal cities c. destruction of coral reefs and wildlife habitat d. wave erosion of beaches, roads, and buildings along the shore