While theBlue Port Hamburg event the digestion towers of the wastewater treatment plant in the Hamburg harbour are illuminated in blue.

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Size: 5854px × 3849px
Photo credit: © Christoph Keller / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: annual, blue, city, digestion, europe, event, free, germany, hamburg, hanseatic, harbour, illuminated, plant, port, towers, treatment, wastwater