The Mayor of Paris, Anne Hidalgo, has promised publicly that the Seine, the river that flows through the French city, will be clean enough to host open water swimming events during the Olympics this summer. But an ongoing problem with dangerous levels of poo and other pollutants has made that promise difficult to fulfil. A plan is afoot to clean the river, but this could be derailed by just one big storm. So will they be able to clean the river in time? This video from Vox explains the problem.
Can Paris fix its poo problem?
