chimney, smog, pollution, clouds, amsterdam, netherlands, air, clean, dirty, pollute, polluted, polluter, polluters, industry, black and white, black and white image, black and white images, black and white photo, black and white photograph, abstract, abstract art, abstract artwork, concept shot, concept, concept image, abstract concept, concept images, concepts, global warming, climate change, sky, factory, factory chimney, factory chimneys, factory smokestack, factory smokestacks, industrial, national capital, air pollution, seat, mill, cloud, unclean, city, impurity, district, person, passage, The Netherlands, european country, capital, conduit, plant, urban area, soiled, conception, center, flue, environmental condition