英文關鍵字
clearing
cut
deforestation
destruction
ecological
ecology
environment
environmetal
equipment
felling
fir
firewood
forest
forestry
forests
green
harvest
harvester
harvesting
industry
issues
log
logging
lumber
lumberjack
machine
machinery
material
paper
pine
saw
sawing
spruce
stack
stacked
timber
tractor
tree
trees
trunk
vehicle
wild
wood
wooden
woodland
work