Ключевые слова: big, cast, coal, coast, diggers, earth, energy, environment, environmental, equipment, excavations, excavators, exposed, fossils, fuels, geological, geologist, geology, ground, holes, huge, images, industrial, industry, island, layers, minerals, miners, mines, mining, mountains, new, non, oceania, outdoors, outside, pacific, photos, pics, pits, power, product, production, progress, prosperity, renewable, resources, seams, shots, snow, south, strata, stratum, under,