Without the greenhouse effect,
A) the Earth would be much colder.
B) no precipitation would fall.
C) there would be no change of season.
D) more earthquakes would occur.
Correct Answer:
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Q83: The World Health Organization estimates that over
Q84: Which is classified as a "greenhouse gas"?
A)helium
B)oxygen
C)iodine
D)nitrous
Q85: The major source of all air pollutants
Q86: Which of the following pollutants has the
Q87: The layer of the atmosphere in which
Q89: Which of the following greenhouse gases is
Q90: Increasing the atmospheric concentration of which of
Q91: The EPA lists six criteria pollutants.Which of
Q92: In the stratosphere,the reactivity of CFCs is
A)low.
B)moderate.
C)high.
D)comparable
Q93: Hydrofluorocarbons (HFCs)and hydrochlorofluorocarbons (HCFCs)are good substitutes for
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