Environmental Science
The gas that absorbs most of the harmful ultraviolet radiation in the stratosphere:

Water vapor
Chlorofluorocarbons
Ozone
Nitrous oxide
Carbon dioxide

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Environmental Science
The atmosphere near the earth's surface is "heated from below." Which of the following does not significantly contribute to this heating?

Absorption of infrared energy that has been radiated from the surface
Convection from a hot surface
Conduction of heat upward from a hot surface
Heat energy from the earth's interior

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