World Geography
The modern theory of plate tectonics states

All of these
that the oceanic crust is destroyed at areas where this crust type becomes subducted under the light
the creation of oceanic crust and the drifting of continents
the convention currents within the earth's mantle cause the creation of new oceanic crust at the mid

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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
tertiary wind that carry great quantities of fine dust from the Sahara
All of these

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