Coal lump in scientist hand. Laboratory coal analysis, fossil fuel research.

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Keywords: analysis, anthracite, big, black, burning, carbon, charcoal, clean, climate, coal, dark, dirty, ecology, electricity, emissions, environment, fossil, fuel, gloves, industrial, industry, lab, laboratory, lignite, lump, mineral, nugget, pollution, power, raw, research, researcher, rock, scientist, stone, test, warming