World Geography
The infrared radiation by sun are strongly absorbed by

water vapours
carbon dioxide
carbon dioxide and water vapours
ozone

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World Geography
The Harmattan is

wind that blows during the dry season from December to February
cool, extremely dry wind that forms over the Sahara and blows westward or south-westward to the Af
All of these
tertiary wind that carry great quantities of fine dust from the Sahara

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