Ключевые слова: abstract, background, blue, boat, bright, chimney, clouds, copyspace, emission, emissions, energy, environment, equipment, exhaust, ferry, front, funnel, graphic, horizontal, industrial, industry, marine, metal, minimal, modern, nautical, no smoke, ocean, orange, pipes, power, rust, ship, shipping, simple, sky, smokeless, smokestack, stack, stacks, straight, structure, sunny, transport, tubes, vent, vents, vertical, vessel, white,