燃やす
alternative
background
bio
biofuel
biomass
briquette
briquettes
brown
cheap
chip
close
closeup
compressed
dry
ecology
energy
environment
fire
fireplace
firewood
fuel
heap
heat
heating
industry
material
natural
nature
nettle
organic
pellet
pellets
power
recycling
renewable
sack
sawdust
stove
texture
waste
white
wood
wooden