Ключевые слова: black, burn, carbon, carbon footprint, coal, coal mining, combustion, commodities, commodity, construction, conveyor belt, dirty, dust, earth, emissions, energy, equipment, excavator, fossil fuel, fossil fuels, fuel, geology, global warming, greenhouse effect, greenhouse gas, grey, heavy, industrial, industrialization, industry, machine, machinery, material, mine, mining, natural, ore, pile, pollution, power, processing, raw materials, sorting, transportation, transporting, work,