In 1962 environmental costs amounted to approximately 1 trillion dollars. By 2002 environmental costs had:

a. Quadrupled.
b. Stayed the same.
c. Tripled.
d. Doubled.


Answer: a. Quadrupled.

Environmental & Atmospheric Sciences

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Match the soil horizon with the correct definition

A) Accumulation of clay particles from upper layers B) Partially altered parent material that is easily identifiable C) Composed of a mixture of humus and mineral material D) Consists largely of organic material, still identifiable in uppermost layer E) Light-colored, depleted of soluble materials, little organic material 1) O horizon 2) E horizon 3) C horizon 4) A horizon 5) B horizon

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Why is it difficult for tobacco farmers to convert to farming other crop types?

A) Tobacco is a labor intensive crop B) Tobacco farms are small C) Tobacco tends to make the soil unusable for other crops. D) Both A and B E) Both B and C

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Discuss the silled (barrier) basin model for evaporite deposition. What features of evaporites does this model explain? What will be an ideal response?

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