President Emmanuel Macron wants to jump into the water in front of the Eiffel Tower at this summer’s Olympic Games. The only problem is: the water quality is bad. Why is it so difficult to clean rivers in cities?
President Emmanuel Macron wants to jump into the water in front of the Eiffel Tower at this summer’s Olympic Games. The only problem is: the water quality is bad. Why is it so difficult to clean rivers in cities?