310 000 31 million 3.1 million 31 000
Hekla Eldfell Surtsey Eldgja
Faroe Islands Greenland Scotland Norway
Oil Hydrothermal/Geothermal Energy Gas Solar
Alafoss Gooafoss Detifoss Glymur
Denmark Norway Great Britain France Finland Sweden USSR Sweden
Keflavik Hofu Reykjavik Akuyeri
Fourth Third First Second
Snaefellsjokull Pingvellir Jokulsargljufur Skaftafell