Hydropower is a renewable source of energy that is generated when water flows
through turbines and generators to convert the kinetic energy of the flowing water
into electrical energy. This method of generation relies on huge dams or diversion
structures that are built to alter the natural flow of water.
Since this source of energy is renewable, there is no concern that this source will
ever run out unlike fuel. Another significant advantage is that hydropower is a clean
energy source that does not cause any pollution in the environment. Moreover, this
type of energy is independent of weather conditions where engineers can control the
flow of water on demand unlike other energy sources like solar or wind energy.
However, this source of energy has negative impacts on the environment as well. To
start with, dams limit the flow of water reducing oxygen levels in water which makes
difficult for many fish species to survive. Those dams also disturb the migration of
fish. In addition to that many people consider those hydropower plants as sight
Regardless of the possible drawbacks of hydropower, it is still the most widely-used
renewable power source, where it accounts for more than 54% of the global
renewable power generation capacity.