英文關鍵字
agriculture
background
bark
biomass
birch
blue
cloud
cut
day
energy
environment
felling
firewood
forest
forestry
fuel
fuelwood
green
industrial
industry
landscape
log
logging
logstack
lumber
material
natural
nature
panorama
pile
prepare
renewable
resource
rural
saw
sky
stack
sustainable
timber
tree
trunk
turn
view
wood
wooden
woodfuel
woodland
woodpile
woodstack