If precipitations 
falls on high ground, they exhibit so-called potential energy: On their way down 
through the valleys to the sea, the water can do work. - Therefore, mountainous 
countries with sufficient rainfall are particularly suitable for making use of 
hydropower. 
The map shows the theoretical energy potential in relation 
to the country area, in MWh/km²a.
The 
values are based on the Survey of Energy Resources 2004, published by the World 
Energy Council WEC. They have been used with permission of the editor Elsevier, 
Oxford.
Albania | Andorra | Austria | Belarus | Belgium 
| Bosnia Herzigowina | Bulgaria | Croatia | Cyprus | Czech Republic | Denmark 
| Estonia | Finland | France | Germany 
| Greece | Hungary | Iceland | Ireland | Italy 
| Latvia | Liechtenstein | Lithuania | Luxembourg | FYR of Macedonia | Malta | 
FS of Moldova | Monaco | Netherlands | Norway | Poland | Portugal | Romania | 
Russia | San Marino | Serbia & Montenegro 
| Slovakia | Slovenia | Spain | Sweden | Switzerland 
| Ukraine | United Kingdom | Yugoslavia