In Madrid, vertical gardens will be planted along the entire ring road.

The mayor of Madrid spoke about the Calle 30 Natura project, which will cover the concrete walls along the city's ring road with vertical gardens. The total length of the route is over 32 kilometers. Pollution sensors will also be installed in vertical gardens, which will allow you to find out the level of hazardous substances in the air. The authorities also hope that the plants will improve the appearance of the city and help fight illegal graffiti.