A scientist looks for microbiological pathogens in samples of water, on July 5, 2012, in the organic chemistry unit of the Laboratoire Eau de Paris, a Paris municipal water testing and research laboratory in Ivry-sur-Seine, a suburb of the capital. The Laboratory monitors the entire Paris water distribution network which serves over 3 millions consumers. AFP PHOTO / PATRICK KOVARIK (Photo credit should read PATRICK KOVARIK/AFP/GettyImages)
