Environmental Science
Suppose saturated polar air has an air temperature and dew point of -10o C, and unsaturated desert air has an air temperature of 35o C and a dew point of 10o C. The desert air contains ______ water vapour and has a ________ relative humidity than the polar air.

Less, higher
Less, lower
More, lower
More, higher

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Environmental Science
The atmospheric greenhouse effect is produced mainly by the:

Absorption and re-emission of visible light by clouds
Absorption and re-emission of visible light by the ground
Absorption and re-emission of ultraviolet radiation by the atmosphere
Absorption and re-emission of infrared radiation by the atmosphere
Absorption and re-emission of visible light by the atmosphere

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Environmental Science
During the winter solstice in the Northern Hemisphere:

The noon sun is overhead at 23.5o S latitude
All of these
At middle latitudes in the Northern Hemisphere, this marks the longest night of the year
Astronomical winter begins in the Northern Hemisphere

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