Pile of shiny black coal rocks stacked against a white background
Schlüsselwörter
coal,
rock,
black,
pile,
heap,
lump,
mineral,
fuel,
carbon,
energy,
mining,
texture,
shiny,
hard,
industry,
material,
fossil,
resource,
anthracite,
natural,
deposit,
darkness,
grit,
grain,
cube,
solid,
weight,
power,
heat,
commodity,
formation,
sedimentary,
geology,
earth,
ground,
surface,
stack,
square,
block,
fragment,
aggregate,
abundance,
accumulation,
supply,
wealth,
luster,
isolated,
opaque
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