Environmental Science
An important reason for the large daily temperature range over deserts is:

The ozone content of desert air is very low
Free convection cells are unable to form above the hot desert ground
The light-colored sand radiates heat very rapidly at night
Dry air is a very poor heat conductor
There is little water vapor in the air to absorb and re-radiate infrared radiation

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Environmental Science
The primary cause of a radiation inversion is:

Infrared radiation absorbed by the atmosphere and clouds
Solar radiation absorbed by the earth's surface
Infrared radiation absorbed by the earth's surface
Solar radiation reflected by the earth's surface
Infrared radiation emitted by the earth's surface

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