Late-nineteenth-century cities invested heavily in sanitary infrastructures, and they were proud of it. As this engraving shows, the city of

Late-nineteenth-century cities invested heavily in sanitary infrastructures,
and they were proud of it. As this engraving shows, the city of
Hamburg invited notables to take boat rides through its sewers.
From Uekötter The Greenest Nation? https://t.co/K89Ync4RNn

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