燃やす
anthracite
art
ash
background
black
branch
briquette
brittle
carbon
charcoal
closeup
coal
coke
cokes
combust
combustion
cooking
dark
dirty
emission
energy
environment
fossil
fuel
hard
hardwood
high
industry
isolated
macro
material
mineral
natural
nature
piece
power
pure
purification
purifier
purity
quality
rock
smoke
stick
texture
traditional
trunk
white
wood