abstract
backgrounds
biology
biomass
brown
cutting
deforestation
ecosystem
energy
environment
environmental conservation
fallen tree
fir tree
firewood
forest
front view
full frame
growth
heap
heat
industry
log
logpile
logs
logstack
lumber
lumberjack
natural
nature
no people
outdoors
part of
pine
pine tree
plant
recycling
rural scene
spruce tree
stack
stacked
sustainable resources
timber
tree
tree ring
tree trunk
vertical
wall
wood
wooden
woodpile
woods