More than 2,000 people literally live in the street in Barcelona. In order to survive, these people depend directly on social services from the government or the private sector. In the context of the European Year for combating poverty and social exclusion and to achieve the objective of having nobody sleeping in the streets in 2015.

Arrels is a private foundation created in 1987 and dedicated to providing services for homeless persons in the city of Barcelona. Its website provides ten ideas you can use to participate in the campaign put a roof over Barcelona and ensure shelter to everyone such as: taking a picture that explains what shelter means for you, or propose a way to give shelter to everyone. If you have an account on Flickr you can put the photo there and share it with the Arrels Foundation group called «Posa sostre a Barcelona».