Ключевые слова: airfoil, background, black, black gold, blue, branch, carbon dioxide, coal, coal pile, coal structure, combustible, combustion, dark, dirty, dust, element, energy, energy storage, exploitation, factory, fossil, fuel, fuel material, geology, grill, hard, hard coal, heat, heat and power plant, heat source, industrial, industry, leaf, light source, mine, miner, mineral, mining, panorama, panoramic image, plant, pollution, potential, power, prism, production, raw material, rock, smog, solid, solid fuel, splintered, stack, stone, stove, texture, tree, tuxedo, unclean, underground, wealth,