Environmental Science
Warming in the stratosphere is mainly caused by:

Release of latent heat energy during condensation
Absorption of ultraviolet radiation by ozone
Chemical reactions between ozone and chlorofluorocarbons
Frictional heating caused by meteorites

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Environmental Science
The air temperature is 45o F, the wind is blowing at 30 MPH, and the wind chill temperature is 15o F. These conditions would be equivalent to:

A 30o F air temperature and 15 MPH winds
A 15o F air temperature and 0 MPH winds
A 15o F air temperature and 30 MPH winds
A 30o F air temperature and 45 MPH winds

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