木材ペレット
alternative energy
backgrounds
beech
biofuel
biomass
biomasse
black
briqettes
brown
bundle
close up
cylinder
energy
environment
feedsock
fossil fuel
fuel and power
group of objects
heap
horizontal
large group of objects
log
material
nature
oac
organic
pellet
pellet gun
pellets
pine
renewable
selective focus
trunk
wood
wood chip
wood pellets