機器
balls
beams
brushwood
clearcutting
clearing
climate
commercial
companies
conifer
country
crane
cutting
deforestation
destruction
devastation
earth
ecology
economy
environment
farms
felling
forest
forestry
harvester
harvesting
hewer
industry
jungle
logging
lumbering
lumberman
natural
nature
oxygen
pile
products
protection
silviculture
tacking
technology
thicket
timber
transport
trees
vehicle
wildlife
wood
woodland
work