Western central europe is able to generate hydroelectricity because

Western Central Europe is able to generate hydroelectricity because of it's topography and it's geography.                                            

Explanation:

Western Central Europe is rife with mountainous terrain and is also endowed with a good amount of rainfall yearly.

This in addition to the rivers which flow down its mountains enable the creation of potential energy and conversion of same into kinetic energy  and from kinetic energy into electricity using dams and other requisite power generating equipment such as turbines.

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