英文關鍵字
active
adventure
agriculture
alpine
alpinism
backpacking
bark
blue
branches
brush
business
cedar
change
chop
climate
climbing
clouds
conservation
copy
cut
cutting
damaged
dead
deforestation
ecosystem
environmental
europe
extreme
fallen
freshness
glaciers
gray
green
harvesting
height
highlands
hiking
ice
lumber
moss
mountain
nobody
over
patch
peak
rural
tree
wood
woodcut
woodland