Aitor Larrañaga: "The rain water in cities is not completely clean water."

The CityPoll project has been going on for three years and the ecologist Aitor Larrañaga Arrizabalaga has told us the results. The water that bathes the streets, which has its own path to the sewer system, is not completely clean, and this project has sought ways to monitor this water and study the pollutants that are present in it. It is a project that has been carried out in two cities: In San Sebastian of the Cantabrian Sea, and in Girona of the Mediterranean.