Ключевые слова: big, black, brown coal, carbon, coal, coal mine, coal mining, construction site, destruction, dig, digger, earth, ecology, electricity, energy, environment, environmental, excavation, excavator, exploitation, extraction, fossil, fossil fuel, fuel, geology, global warming, industrial, industry, landscape, large, lignite, machine, machinery, mine, mineral, mining, ore, oredeposit, pit, pollution, power, production, quarry, surface mine, sustainable, work,