MASSIMO BREGA, THE LIGHTHOUSE / SCIENCE PHOTO LIBRARY MASSIMO BREGA, THE LIGHTHOUSE / SCIENCE PHOTO LIBRARY
Water industry. Fish in a tank being observed in a laboratory at a waterworks. The fish are used to test the quality of the water used to produce drinking water. If the fish become ill or die, an examination of the fish may reveal the presence of micro-organisms, toxins or pollutants in the water. Photographed at a waterworks operated by SMAT, the metropolitan water company of Turin, Italy.
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