天然喷泉、温泉和地热蒸气等地热能源为冰岛百分之八十的家庭实现了供暖。
Geysers , hot springs , and steam vents provide geothermal energy that heats 80 percent of Icelandic homes .
一温泉：符合温泉基准之温水、冷水、气体或地热（蒸气）。
" Hot spring " means thermal water , or cold water , or gas , or geothermal ( steam ) which conforms to the standards .
地热蒸气