Environmental Science
The concept that 'population tends to increase geometrically while food supply increases arithmetically' was put forward by

Charles Darwin
Adam Smith
Stuart Mill
Thomas Malthus

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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
Conduction of heat upward from a hot surface
Convection from a hot surface
Heat energy from the earth's interior

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