TransPiedra started out as the traditional skip company, managing the rubble of all times, what would later be known as CDW (construction and demolition waste). We kept up with the times, because the times were changing. One day, when collecting a container of rubble from a Ferrovial construction site, we saw a wooden box with a sign saying “spray cans”. We asked and it turned out that hazardous waste had arrived at the works, segregation had begun, that was good, and strange at the same time, wasn’t it all going into the same container? It was our first environmental authorisation, Gestores de Residuos Peligrosos. Then a Captain of the now defunct Sea Land asked us for a “Marpol Certificate”, so let’s become a Marpol Agent. And so on to infinity and beyond.