Environmental Science
This is used as an index for fuel consumption:

Consumer price index
Heating degree-days
Growing degree-days
Mean annual temperature

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Environmental Science
The primary cause of a radiation inversion is:

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

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