Wetland pollution research. Agricultural engineer (left) collecting water samples as an ecologist uses a multimeter to record water quality at a const

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Wetland pollution research. Agricultural engineer (left) collecting water samples as an ecologist uses a multimeter to record water quality at a constructed wetland, in order to determine how well the wetland filters pollutants. Photographed at Beasley Lake, Wisconsin, USA.

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Size: 3751px × 2500px
Photo credit: © STEPHEN AUSMUS/US DEPARTMENT OF AGRICULTURE/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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