Environmental Science
When the air temperature is below freezing, the saturation vapour pressure over water is .

Equal to zero
Greater than the saturation vapour pressure over ice
Equal to the saturation vapour pressure over ice
Less than the saturation vapour pressure over ice

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Environmental Science
Which of the following helps to explain why even though northern latitudes experience 24 hours of sunlight on June 22, they are not warmer than latitudes further south?

Some of the sun's energy is reflected by snow and ice in the northern latitudes
Increased cloud cover reflects solar energy in the northern latitudes
All of these
Solar energy is spread over a larger area in northern latitudes
Solar energy is used to melt frozen soil in the northern latitudes

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