Harnessing the energy from falling or running water, hydropower is a renewable and environmentally friendly source of electricity. Historically, watermills were utilized to drive various mechanical devices like mills and forges.
Today, hydropower is usually processed into electricity
Also, it works directly, for example
water wheel
turbine
In Poland:
It's far only 1.5%
Countries like:
Brazil
Paraguay
The Democratic Republic of the Congo
Norway
They are using more than 85% of its electricity from hydropower
Water energy
is power derived from the energy of falling water or running water, which may be harnessed for useful purposes
Before the invention of hydro electric machines commonly used to drive:
fullings
forges
mills
Since ancient times, hydropower from many kinds of watermills has been used as a renewable energy source for irrigation and the operation of various mechanical devices, such as: