Ключевые слова: business, chemical, chemicals, chemistry, city, climate, commercial, conduit, contamination, discharge, duct, ecology, ecosystem, emissions, energy, enterprise, environment, factory, fume, global, industrial, industry, infrastructure, landscape, manufacturing, megalopolis, megapolis, oil, petroleum, pipe, pipeline, piping, plant, pollution, power, skyline, smoke, snow, soiling, tank, town, tube, tubing, urban, urbanistic, warming, winter, works,