Final answer:
Hydro-electric power is a renewable energy source generated from the motion of water, using the conversion of gravitational potential energy into kinetic energy to drive turbines and generate electricity. It's clean, efficient, and a significant contributor to the global energy supply, although it can have environmental impacts.
Step-by-step explanation:
Hydro-electric power is a type of renewable energy that is generated from the motion of water. Specifically, this clean energy source comes from the gravitational potential energy of falling or flowing water being converted into kinetic energy, which in turn is used to drive turbines. These turbines spin a generator to produce electricity. Worldwide, hydropower is a significant contributor to the electricity supply due to its high efficiency and nonpolluting characteristics. It is one of the oldest and most utilized sources of renewable energy. Despite its benefits, the construction of dams for hydropower can have environmental impacts, such as disrupting fish migration; however, measures like fish ladders are sometimes implemented to reduce these effects.