It is predicted that by 2030 there will be a 40 per cent water deficit in relation to demand. How can we take care of what we don't know very well? This edition of the Porto Design Biennale presents a programme of exhibitions and other activities that will work simultaneously on the visible and invisible, organic, inorganic and ephemeral spectra of water. As well as designing better and more efficient uses for water, this edition of the Porto Design Biennale will endeavour to conceive models of alternative, symbiotic cohabitation between humans and more than humans, in an advantageous and sustainable relationality for all. Taking place between October 19 and December 3, the Porto Design Biennale today released its detailed programme for an edition that starts from the most fundamental element, Water, to discuss and think about the role of Design in the emerging environmental survival. Curated by Fernando Brízio, this edition's Main Programme features a series of exhibitions, installations and talks that aim to create a transdisciplinary platform for thinking about the various dimensions and experiences surrounding water resources. The programme brings together national and international voices in a dialogue that seeks to shape more sustainable, equitable, free and happy futures. Petrichor, the Smell of Rain is the main exhibition in this year's programme. Designed by Fernando Brízio and installed at Casa do Design in Matosinhos, this exhibition emphasises the ubiquity of water, its presence and circulation as a central element connecting all things. Through fluid interfaces (artificial heart valves, diving helmets, boats, ship traffic trackers, underwater vehicles for mapping underground aquifers, among many others) and also places of communication, exchange, interaction/intra-action between waters (in their various states), and between waters and other agents, we reflect on aqueous fluid interfaces and how they are crucial to all the relationships of matter in the world. The Porto Design Biennale is an event that has fostered debate and welcomed multiple concerns and perspectives, as well as stimulating interest in design, encouraging new discourses and practices that increase the discipline's forward-looking capacity to devise innovative solutions to collective problems. Promovida em colaboração entre dois municípios (Porto e Matosinhos) e organizado pela esad—idea, Investigação em Design e Arte, a Porto Design Biennale procura ser uma plataforma de diálogo entre a sociedade civil, a academia, a indústria, instituições e agentes culturais nacionais e internacionais.