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Water is one of our key natural resources; we must protect it vigorously.
A glacier is a large body of ice that forms from snow, and is in constant, slow motion.
Groundwater and aquifers are types of underground waters.
Karst formations include dolines and dripstones.
The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable...
Tsunami waves are very high waves of immense destructive power.
Lateral compressive forces cause rocks to form folds. This is how fold mountains are...
Wind, as an external force, plays an important role in shaping coastal areas and steppes.