Ключевые слова: action, big, black, brown, bucket, carbon, coal, digger, digging, dust, earth, ecology, energy, enormous, environment, environmental, excavation, excavator, exploitation, fossil, fuel, giant, gigantic, ground, heap, heavy, industrial, industry, large, loader, machine, metal, method, mine, motion, move, nature, power, scoop, steel, strip, surface, technology, utility, vehicle, wheel, work,