A man with a white t-shirt on his head walks his dog on the banks of the Rhine while the tanker under German flag 'Eiltank 84', and the Netherlands flag tanker 'Unity' sail on August 3, 2022, in Cologne, Germany. In recent years climate change has meant that ferries have to be shut down more and more often - due to low water. Fot: Thierry Monasse/REPORTER