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The last Ice Age ended about 13 thousand years ago.
Natural gas and petroleum are among the most important sources of energy and raw materials today.
The duration of solar radiation, the angle of the Sun's rays and the surface albedo all have an...
Karst formations include dolines and dripstones.
Wind, as an external force, plays an important role in shaping coastal areas and steppes.
Vertical forces can break up layers of rock into fault blocks, which then move vertically...
Waves play an important role in forming the coast.
A glacier is a large body of ice that forms from snow, and is in constant, slow motion.