Pile of dark gray coal chunks on white background. Close-up view of several rough-edged, irregular pieces
Schlüsselwörter
coal,
chunk,
piece,
dark,
grey,
black,
pile,
fuel,
energy,
geology,
mineral,
fossil,
rock,
solid,
heavy,
industrial,
raw,
material,
resource,
power,
mining,
extraction,
natural,
blackness,
compact,
dense,
rough,
isolated,
white,
background,
close,
up,
macro,
industry,
carbon,
deposit,
substance
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