oil pump, industrial zone, oil industry specialization, oil-rich land, drilling, oil storage tanks, oil refineries, pipelines, trucks transporting oil, smoke plumes, oil derricks, resource overlay, city simulation game, economic strategy, infrastructure, trade, resource management, realistic textures, detailed machinery, pollution effects, night lighting, industrial district, economic growth, supply chain, city skyline background, strategic placement, resource extraction, heavy traffic, commercial demand, oil power plants, oil harbor, cargo trains.