08.03.2021, Bottrop, North Rhine-Westphalia, Germany - Theme photo Emscher reconstruction, the Emscher system will be sewage-free in 2021, new construction of a sewer on the Boye, the second largest tributary of the Emscher, a worker goes through the DN 3500 tunnel, the Boye will be renaturalized, will be transformed into a near-natural watercourse, was previously an open, surface sewer, combined sewer with surface water and sewage, the ecological reconstruction of the Emscher system consists of the construction of a central sewage system in the Ruhr area, the construction of sewage canals and the renaturation of the Emscher and its tributaries. 00X141113D035CAROEX.JPG [MODEL RELEASE: NO, PROPERTY RELEASE: NO (c) caro images / Oberhaeuser, http://www.caro-images.com, [email protected] - In case of using the picture for any purpose, please contact the agency - the picture is subject to royalty!]