Join一 科学与技术 upcoming events being held in Copşa Mică. Copşa Mică is a small town located in the Transylvania region of Romania, known for its rich history, picturesque landscapes, and the unique industrial heritage of its famous Steam Locomotive Factory, though it has also gained notoriety for being one of the most polluted places in Europe during the communist era, an aspect that the town has been actively addressing and working to overcome in recent years.