英文關鍵字
active
activity
aerial
angle
area
autumn
bad
barren
blue
boil
brown
destination
dioxide
energy
environment
formation
fumarole
fume
gas
geological
geology
geophysics
geothermal
geothermic
high
hot
hydrogen
iceland
land
landscape
mafjall
mud
mudpots
namafjall
natural
nature
smoke
solfatara
spring
steam
stinking
sulfide
sulfur
temperature
thermal
tourism
travel
view
volcanic
volcano
wide
wild
yellow