Stock photography, photos: Stairs Stock photos of Industrial abstract of shadow and shape of stairs. Photograph: © Dan Creighton Click for a larger image and more information Keywords associated with this stock photo: IMAGE/COLOR/STYLE/FORMAT, North America, PA, pollute, mercantilism, industry, manufacturing facility, plant, landscape (industrial), industriousness, industrial abstracts, landscape (ugly), Pennsylvania, industrial safety, USA, world regions & countries, United States of America, polluted, pollution, structures, trade, US, smog, industrial building, square, shape, safety, abstraction, CHARACTERISTICS, environmentalism, concepts, CATEGORIES, architecture, capitalism, commerce, building, architectural, abstract, air pollution, concept, business, America, ecology, ecosystem, horizontals, horizontal, environment, factory, edifice, edifices, contaminated, enterprise, conceptual, contaminate, light, shadowed, shadow, lighting, building detail, architectural detail, stairway, stairs, steps, step