Smog is responsible for which of the following?
a) An estimated 50,000–180,000 premature deaths in the U.S. annually.
b) A global reduction in agricultural productivity.
c) Extensive damage to forests.
d) All of the above.
d) All of the above.
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Although muscovite, feldspar and quartz are not considered useful as index minerals, which of the following situations could be useful in determining the grade of metamorphism in a region?
A) the coexistence of muscovite, feldspar and quartz B) the disappearance of rocks containing muscovite and quartz C) the coexistence of feldspar and quartz D) the disappearance of rocks containing quartz
Which is greater in a tropical cyclone — the risk to people from fl ooding
due to the heavy rainfall, or the danger posed by severe winds? What will be an ideal response?
The zone of seasonally frozen ground that exists between the subsurface permafrost layer and the ground surface is called the
A) gelifluction. B) discontinuous region. C) active layer. D) talik.
Though the political borders of many European countries resemble nation-states, there is too much diversity within the nations to consider the ideal of creating a nation-state a true reality.
a. true b. false