Environmental Science
The atmospheric greenhouse effect is produced mainly by the:

Absorption and re-emission of infrared radiation by the atmosphere
Absorption and re-emission of visible light by the ground
Absorption and re-emission of visible light by the atmosphere
Absorption and re-emission of visible light by clouds
Absorption and re-emission of ultraviolet radiation by the atmosphere

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Environmental Science
Thermal belts are:

Cold, below-freezing air found at the top of a mountain
Warmer hillsides that are less likely to experience freezing conditions
Pockets of cold air resting on a valley floor at night
Pockets of warm air resting on a valley during the afternoon

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