Which horizon contains the parent material from which the soil is formed?
a. a
b. b
c. c
d. d
C
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World-empires introduced ________ to enlarge their resource base in the face of rising populations
A) colonization B) the law of diminishing returns C) urbanization D) import substitution E) minisystems
Increasing temperatures leading to increasing water vapor amounts leading to increasing absorption of longwave radiation is an example of a
A) negative feedback B) positive feedback C) neutral feedback D) adiabatic feedback
Methane has about a 24-times stronger capacity to trap heat as a greenhouse gas than does carbon dioxide.
Answer the following statement true (T) or false (F)
Reducing the risk of a landslide on an unstable, steep slope can be accomplished by all of the following except
A. placement of additional supporting material at the base of the slope. B. reduction of slope load by the removal of material high on the slope. C. increasing the moisture content of the slope material. D. reduction of slope angle.