The production of electricity with hydroelectric power plants represents 80% of all renewable electric power generation worldwide. Hydro plants work by using the flow of water to turn a turbine, which then turns a metal shaft in an electric generator, which is the motor that produces electricity. Hydroelectric power plants accounted for 15.97% of all electric power produced worldwide in 2008.

In the United States, 6% of electricity is generated in hydro plants, a relatively small percentage compared with other nations. The ability to use hydroelectric power plants to generate electricity is, of course, to a large extent a matter of having the resources needed to harness water’s power. Paraguay, for example, produces 100% of its electricity—as well as electricity enough to export—from hydroelectric power plants while Saudi Arabia has no hydroelectric power generation. A chart which shows the top twenty countries in the world based on their production of hydropower and based on the same source material is presented on the blog, LaMarotte, here.

Geographic reference: World
Year: 2008
Market size: 2,998 Billion Kilowatt hours
Source: “Table 1387. Net Electricity Generation by Type and Country: 2008,” Statistical Abstract of the United States: 2011, page 867, available online here.
Original source: U.S. Energy Information Administration (EIA)