Barcelona Green Shops

ATARCA aims to promote green and sustainable consumption through anti-rival tokenization to reward the contributions of Green Shop clients. This case builds off of the already established social currency, REC, and its use in Green Shops, a network of local shops committed to reducing waste and promoting local, sustainable products.

This anti-rival approach to currency requires the participation of local stakeholders such as shop owners, local producers, consumers, and neighborhood associations. Because of the importance of the local community in this use case, we utilize participatory design measures to develop tools that meet the needs of its users.

The anti-rival tokenization will occur in two main ways:

  • Clients and consumers of the Green Shops will receive an sntNFT (shareable, non/transferable, non-fungible token) to provide feedback on the impact of purchases
  • Shopkeepers will receive sntNFTs for their contributions to the shopkeeper community

In this use case, NOVACT, the promoter of REC, will work together with Rezero, a foundation that encourages Zero Waste among local shops in the region of Catalonia, to enhance the REC technology to meet the needs of the Rezero network.

REC (Real Economy Currency)

  • The REC (Real Economy Currency) is Barcelona‚Äôs social currency. It is a citizen exchange system complementary to the euro, allowing transactions in a community between individuals, institutions and businesses that accept it. The REC (…Ć) is an exclusively digital currency and can be used with a mobile app.
  • Social currencies favor local businesses, and the profits revert to the community. The main objective of the REC is to make it easier for money to remain in the area with the view of developing the local economy and relations between the local community and increasing the economic and social vitality of the districts:
    • Money stays in the district and circulates locally
    • Local trade is reinforced, and streets do not become deserted
    • Networks involving residents, businesses and institutions are reinforced, creating social cohesion
  • The social currency was created as part of the socially innovative B-MINCOME pilot project, in which part of public spending is channeled through the social currency in the Eix Bes√≤s area. The REC is now expanding to other areas of the city, willing to become more broadly used.
REC barcelona logo


  • Rezero is a foundation that creates knowledge and promotes innovative ideas, regulations and¬† projects¬† so¬† that¬† both¬† companies,¬† public administrations and citizens can have the opportunity to enjoy a model of production and consumption towards Zero Waste, without toxic materials or products that are left without use.
  • One of the projects is Comer√ß Verd, an initiative designed to identify and promote those local shops that sell environmentally friendly products. This network has shops in Catalonia and around 400 in Barcelona.

This project has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement No 964678. The content of this website does not represent the opinion of the European Union, and the European Union is not responsible for any use that might be made of such content.