Ключевые слова: blue, color image, colors, continuity, curve, diagram, distant, focus on foreground, gradient, gray, group of objects, horizontal, human height, image, image created 2000s, image created 21st century, image date, industry, light colors, mathematics, metal, model, no people, outdoors, pointing up, pollution, red, six objects, smoke, smoke pipe, stability, straight, striped, sun, sunlight, symbol, vibrant color, white,