The desert

One third of the continents is covered with desert. Today, desertification is a growing problem.

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Polluting natural waters

Water is one of our key natural resources; we must protect it vigorously.

Glacier (intermediate)

A glacier is a large body of ice that forms from snow, and is in constant, slow motion.

Underground waters

Groundwater and aquifers are types of underground waters.

Karst region (basic)

Karst formations include dolines and dripstones.

Ozone layer

The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable...

Tsunami

Tsunami waves are very high waves of immense destructive power.

Folding (basic)

Lateral compressive forces cause rocks to form folds. This is how fold mountains are...

Aeolian landforms on coasts and steppes

Wind, as an external force, plays an important role in shaping coastal areas and steppes.

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