Environmental Science
The slow rate of decomposition of fallen logs in nature is due to their

low cellulose content
low moisture content
anaerobic environment around them
poor nitrogen content

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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?

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

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