Brazilian architects Projecto Coletivo have created a conceptual skyscraper which could be constructed along the river in the city of Sao Paulo using debris, dezeen reported. The skyscraper would contain a recycling center at the base and provide housing for the city’s homeless in its upper levels.

Scrap material would come to the recycling centers by boat where residents would be able to use anything from car parts to plastic bottles to old bathtubs to augment and expand the building.

“This material will be used on the building’s construction and also for crafts, urging creativity of the own workers,” the architects wrote in their project description. “The opportunity for a social revolution gives homeless people the chance to learn a trade and have a place to live.”