Earth's atmosphere differs from those of near-neighbor planets Venus and Mars in one important respect:
A) Earth's atmosphere has a much larger fraction of carbon dioxide than has either of the other two atmospheres.
B) The atmospheric temperature at the surface of Earth is much higher than those of the other two planets.
C) Earth's atmosphere has a significant fraction of oxygen.
D) Earth's atmosphere has a higher pressure than have the other two planetary atmospheres.
Correct Answer:
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