A stack of black coal isolated on transparent background
Schlüsselwörter
coal,
fuel,
energy,
black,
rock,
mineral,
carbon,
power,
fossil,
isolated,
transparent,
background,
alpha,
resource,
mining,
heap,
pile,
stone,
industry,
heat,
combustion,
deposit,
geology,
natural,
raw,
material,
industrial,
source,
lump,
anthracite,
bituminous,
sedimentary,
formation,
element,
era,
geologic,
single,
object,
stack,
piece,
chunk
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