木材ペレット
alternative energy
background
backgrounds
beech
biofuel
biomass
biomasse
briqettes
brown
bundle
closeup
cylinder
energy
environment
fossil fuel
fuel and power
group of objects
heap
horizontal
large group of objects
log
material
mix
natural
nature
nobody
oak
organic
pellet
pellet gun
pellets
pine
renewable energy
solid
trunk
wood
wood chip
wood pellets