燃やす
bio
biofuel
biomass
boiler
boilers
briquettes
central
chip
close
coniferous
conservation
eco
ecology
energy
environmentally
fire
fireplace
flaming
friendly
fuel
granule
green
heating
horizontal
macro
mass
natural
pellet
pellets
pieces
power
recycling
renewable
sawdust
shot
source
stove
studio
wood
woodchip