Barcelona premiered the first smart rubbish containers, as a response to the crisis that arose in Sant Andreu de Palomar as a result of the implementation of door-to-door collection. A controversy that caused a step back in the planned schedule to extend the system to other neighborhoods. Meanwhile, the individual containers for organic matter were eliminated and the new smart containers were installed, which, unlike the previous ones, can be used every day at any time. As for the container opening system that was installed, this is through a key ring that the neighbors could pick up at the information points that were set up.