Translate the following English sentence to French:
"In Scandinavia, which perhaps has what is at present the most efficient eco-labelling system, there are now already a number of eco-labels complementing, and operating fairly well alongside, each other."
En Scandinavie, où le système d'étiquetage est sans doute actuellement le plus efficace, il existe déjà plusieurs labels de ce type qui coexistent relativement bien en se complétant mutuellement.