Currently, more than 25 countries in the world depend on hydropower for 90 % of their electricity supply (99.3 % in Norway), and 12 countries are 100 % reliant on hydro. Hydro produces the bulk of electricity in 65 countries and plays some role in more than 150 countries. Canada, China and the United States are the countries which have the largest hydropower generation capacity (IPCC, 2011;REN21, 2011; and IHA, 2011).
Three Gorges Dam in China
Rance Tidal Power Station in France