Environmental Science
The primary cause of a radiation inversion is:

Infrared radiation emitted by the earth's surface
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

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Environmental Science
Definition of ecosystem is

The part of the earth and its atmosphere which inhibits living organisms
The community of organisms together with the environment in which they live
The abiotic component of a habitat
A community of organisms interacting with one another

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