Environmental Science
When clouds are viewed near the horizon, the individual cloud elements usually:

Appear to have more vertical development than is actually the case
Appear farther apart than is actually the case
Appear lighter in color than is actually the case
Appear closer together than is actually the case

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

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