Environmental Science
The Gulf Coast states are more humid in summer than the coastal areas of Southern California mainly because of the:

Higher water temperature in the Gulf of Mexico
Lower air temperature in Southern California
Low relative humidity of the air over the Pacific Ocean
Higher air temperature in the Gulf States

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Environmental Science
The earth's radiative equilibrium temperature is:

The temperature at which the earth is radiating energy at maximum intensity
The temperature at which rates of evaporation and condensation on the earth are in balance
The temperature at which the earth is absorbing solar radiation and emitting infrared radiation at equal rates
The average temperature the earth must maintain to prevent the oceans from freezing solid

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