Black Coal from Natural Sources in a Pile for Energy Production
Schlüsselwörter
coal,
black,
energy,
natural,
resource,
carbon,
mining,
fuel,
combustion,
geology,
texture,
rock,
environment,
industry,
material,
background,
fossil,
raw,
deposit,
organic,
fossil fuel,
extraction,
heat,
power,
environmental,
economy,
supply,
production,
sustainability,
clean,
space,
landscape,
earthy,
industrial,
trade,
mineral,
natural resource,
energy production,
energy efficiency
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