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***Crédits photo :***  
AWL Images, Courtesy of QGC/BG Group, Confab/VWS Brasil LTDA, Clover Images, Collection particulière Patrice Bonarelli, Corbis, Design Pics, Digital Vision, E+, Glowimages , Godefroy/SNCF, Iconica, IStock/360, OEM Images, Photodisc, Photos.com/360, Kacper Kowalski, National Geographic, Moment, Torsten Proß, Didier Olivre, Royalty-Free/Corbis, RMN-Grand Palais/Jean-Gilles Berizzi, Jose Luis Stephens/Radius Images,​Sodapix AG, Shin Takahashi, Iser, Stockbite, Stone,Tara Expéditions, Tetra Images, WorldWaterWeek, Boras Energi and Miljo, OJO Images, Ken Choi, Gilles ROLLE/REA, Sóki Támas/MTI, Getty Images/amana images RF, Ivan Autet, Axel Ducourneau/CNRS, Design Pics, Courtesy of World Water Council, Courtesy of KHNP, René Tanguy, Fancy.

***Photothèque Veolia** :*  
Salah Benacer, Samuel Bigot/Andia, Alexis Duclos, Philippe Eranian, Rodolphe Escher, Olivier Guerrin, Stéphane Lavoué, Eric Lefeuvre, Christophe Majani, d'Inguimbert, Chris Maluszynski/Agence VU, Jean-Philippe Mesguen, Manolo Mylonas, Jean-Marie Ramès, Justin Sutcliff/Interlinks Image, Munem Wasif/Agence VU, Alexandre Dupeyron, Chris George, Jean-François Pélégry, Bryan Spear, Rodrigo Gomez Rovira/Agence VU, Daniele Mattioli/Interlinks Image, Taco Van Der Eb/Interlinks Image.