Coals on white background
Schlüsselwörter
coal,
carbon,
mineral,
fossil,
fuel,
combustible,
stack,
pile,
heap,
lump,
mine,
mining,
industry,
stone,
heat,
rock,
heating,
power,
energy,
station,
plant,
factory,
combustion,
pollution,
isolated,
black,
grey,
dirty,
white,
copy space,
space,
cut,
nugget,
piece,
production,
exploitation,
calorific,
resource,
copy space
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