Spain-Barcelona: Nature-based solutions for sustainable cities. From Rafael Afonso LinkedInTwitter / XEmailCopy Link 23/10/2023 1 minutes reading time Key Facts Locations: Barcelona (Spain) Opening and closing date: 07/09/2023 - 09/11/2023 Challenge area: Creating Public Realm Pollution Reduction Offered by: EIT Urban Mobility | Smart Cities Marketplace Register or Login to see the Who can apply and Background Register or Login