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Image Number K9997-1 Scientists work together to conduct a rainfall-simulation test to measure bacteria levels in runoff water. From left to right are Reza Roodsari, Ali Sadeghi, Kerry Sefton, Adel Shirmohammadi, and Dan Shelton. Photo by Stephen Ausmus.  640 pixels wide: (k9997-1.jpg)   Please visit our Image Gallery


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