The term "ecological restoration" refers to
A. a destructive consequence of road building.
B. the process of repairing damage caused by humans to the biodiversity and dynamics of natural ecosystems.
C. the natural cycles of habitat destruction.
D. the process that corals and sea snails use to create shells using carbonate ions.
E. an ecological initiative using small scale farming.
Answer: B
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Ground-source heat pumps use the difference in temperature between the air and soil to warm and cool buildings. The upper 10 ft of the Earth is always at a constant temperature of ________, which is ideal for warming buildings in the winter and cooling
them in summer. A) 100-20°F B) 225-60°F C) 50-60°F D) 70-80°F E) over 360°F
Which of the following statements is TRUE regarding the population pyramids for Uruguay and Guatemala?
A) Guatemala has a higher RNI and TFR than does Uruguay
B) Uruguay will have significant population growth in the coming decades
C) The population of Uruguay is generally younger than that of Guatemala
D) Uruguay has a higher rate of natural increase (RNI) than does Guatemala
E) Guatemala has a lower total fertility rate (TFR) than does Uruguay
Compared to a polar air mass, a tropical air mass is typically
A) cooler. B) dryer. C) less stable. D) farther from the equator. E) all of the above
An advantage of materials recovery facilities (MRFs) is that they
A. encourage a low throughput of garbage. B. have low operation and maintenance costs. C. eliminate the production of toxic ash D. do not emit carbon dioxide and methane. E. recover valuable materials for resale.