Environmental Science
Of the gases listed below, which is not believed to be responsible for enhancing the earth's greenhouse effect?

Nitrous oxide (N2O)
Molecular oxygen (O2)
Methane (CH4)
Carbon dioxide (CO2)
Chlorofluorocarbons (CFCs)

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Environmental Science
When the air is saturated, which of the following statements is not correct?

The air temperature equals the wet-bulb temperature
The wet bulb temperature equals the dew point temperature
An increase in temperature will cause condensation to occur
The air temperature equals the dew point temperature
The relative humidity is 100 percent

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Environmental Science
The earth is tilted at an angle of 23.5o with respect to the plane of its orbit around the sun. If the amount of tilt were increased to 40o, we would expect in middle latitudes:

Hotter summers and colder winters than at present
Cooler summers and milder winters than at present
No appreciable change from present conditions
Cooler summers and colder winters than at present
Hotter summers and milder winters than at present

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