Ключевые слова: activity, area, background, bulldozer, coal, cobblestone, construction, digger, digging, dramatic, earth, ecology, environment, equipment, excavator, factory, geology, godlight, gravel, ground, heavy, industrial, industry, landscape, machine, manufacturing, mine, mineral, mover, nature, openpit, outdoor, pebble, pit, quarry, resource, road, rubble, sand, site, sky, stone, surface, technology, transport, transportation, truck, vehicle, work, yellow,