燃やす
anthracite
background
black
block
carbon
charcoal
closeup
coal
coalmining
collection
combustion
cut
dark
depth
dirty
electricity
energy
environment
exploitation
extraction
fire
fossil
fractured
fuel
geology
heap
heat
industrial
industry
isolated
many
material
mine
mineral
object
old
piece
pollution
power
production
raw
resource
rock
small
stack
stone
structure
texture
white