εργοστάσιο ηλεκτρισμού, βιομηχανική μονάδα, βιομηχανία, άνθρακας, καμινάδα, άνθρακα, περιβάλλον, ρύπανση, καπνός, ruhr περιοχή, παραγωγή ηλεκτρικής ενέργειας
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