Water purification system, dating back to third century BC. Filtering material is contained within the tubes. Water passes through the filter and is t

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Water purification system, dating back to third century BC. Filtering material is contained within the tubes. Water passes through the filter and is then collected for consumption. Photographed in Empurieus, Spain.

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Size: 4168px × 4207px
Photo credit: © SHEILA TERRY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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