Coding Plants: An Artificial Reef and Living Kelp Archive. Courtesy of Terreform ONE
This curated selection of projects from the 2025 Venice Architecture Biennale explores how architects and designers are rethinking the relationship between the built environment and water in response to the global climate crisis. As sea levels rise and extreme weather events increase, water is no longer a distant threat but an immediate design condition. Rather than resisting it, these projects look at how architecture can coexist with, adapt to, and even regenerate through natural forces. Together, they suggest a shift toward working with the elements, acknowledging water not as a limit to construction but as an active participant in shaping future environments.
Biodiversity, defined by the World Wide Fund for Nature (WWF) as the different kinds of life found in an area, is in a state of crisis all across the world, with declines in the numbers of organisms and many species declared as at risk of extinction. All types are affected, from plants and fungi to large mammals, and there is a clear link to human activity being the cause. Although farming methods and climate change due to greenhouse gases play a major role, cities and buildings can play a small but important role in countering this decline.
Bauhaus Earth is a Berlin-based non-profit organization working toward a systemic transformation of the built environment. Its mission includes transitioning to bio- and geo-based materials, reusing existing buildings, and restoring ecosystems. Together with the Bamboo Village Trust, a philanthropic financial vehicle, and Kota Kita, a participatory urban design organization, Bauhaus Earth has developed BaleBio, a bamboo pavilion designed by Cave Urban and rising above Mertasari Beach in Denpasar, Bali. The pavilion transforms a disused car park into an open community meeting space, offering a counterpoint to the city's tourism-driven coastal development. Designed as a regenerative building, BaleBio stores carbon instead of emitting it, challenging the extractive construction model that is replacing traditional wood and bamboo craftsmanship with concrete structures across the island.
With just a few days left before the six-and-a-half-month 19th Venice Architecture Biennale comes to an end, it is possible to look back on some of the most notable contributions within its thematic framework. Marked by the largest call for participants to date, the Biennale's diversity of topics and the range of installations on display go beyond easy recapitulation. As part of that reflection, several initiatives can be highlighted as illustrative of the principles reflected in the curatorial theme, "Intelligens. Natural. Artificial. Collective." The concepts interwoven in Carlo Ratti's title form a call to address the urgent need for substantial solutions amid the accelerating climate crisis, positioning the Biennale as a platform for diverse design proposals and experiments organized around three forms of intelligence: natural, artificial, and collective. Beyond the national pavilions and numerous collateral events held throughout Venice over the past six months, among the more than 700 participants are projects that, through practice, embody four shared intentions: opening conversations about the future, proposing systemic responses to local realities, placing technology at the center of design innovation, and pursuing material research rooted in local sensitivity.
Vernacular architecture is often referred to as harboring lessons for creating low-energy buildings and the fight against climate change. Yet, as weather patterns are changing, there are cases where traditional building techniques are themselves becoming at risk. As well as changes in temperature, different regions have faced becoming wetter or drier, experiencing increased risk of droughts, flooding, storms, and changes to local flora. The painted houses of Tiébélé in Burkina Faso, recognized as a UNESCO World Heritage Site, are one example.
There are places in the world where temperatures already exceed fifty degrees, and others where water levels rise meters above expected levels. Meanwhile, in the heart of São Paulo, architects, researchers, artists, and communities come together to ask: how can we inhabit the Earth in times of extremes? This question drives the 14th International Architecture Biennial of São Paulo, held at the Oca in Ibirapuera Park, focusing on the theme Extremes: Architectures for a Hot World. More than an exhibition, it is a call to confront the climate crisis, social inequality, and the urgent need to reinvent ways of living.
Unlike previous editions, which were spread across multiple locations in the city, curators Clevio Rabelo, Jera Guarani, Karina de Souza, Marcella Arruda, Marcos Certo, and Renato Anelli chose to concentrate this year’s edition under a single roof, allowing the curatorial narrative to unfold clearly and directly. The entire journey is there, organized into sections that weave together ancestral practices and emerging technologies, material experiments and critical perspectives, local projects and global debates. The Oca thus becomes a crossroads: a space where diverse architectural visions overlap, offering a platform for collective reflection on society and the environment.
Every act of building begins with the transformation of raw materials, energy, and land, and this inevitably entails environmental impact. This encompasses all the changes a process triggers in the natural world: from resource extraction to pollutant emissions, from energy consumption to biodiversity loss. Measuring this is complex, as it spans multiple dimensions. Carbon has emerged as the common metric, translating these effects into greenhouse gas emissions (CO₂ equivalent) directly linked to global warming. This standardization has made it omnipresent and comparable across materials, systems, and sectors. Reducing carbon emissions, therefore, means addressing the root of global warming, which is a particularly urgent task in the construction industry, responsible for about 39% of global emissions. In response to this challenge, MVRDV NEXT, the innovation and digital tools division of the Dutch architectural firm, launched CarbonSpace, a free, open platform that brings carbon accounting to the architect's desk, right at the napkin sketch stage.
When exposed to heat, the body activates several physiological mechanisms to maintain thermal homeostasis. However, these natural defenses are often overwhelmed in our modern cities.In an urban environment defined by heat-absorbing asphalt, concrete, and a lack of green spaces, these mechanisms become inefficient. If the surroundings are excessively hot, humid, or poorly ventilated—conditions amplified by the Urban Heat Island effect—the core body temperature begins to rise, and the risk of serious complications increases, ranging from cramps and exhaustion to potentially fatal heat strokes.
Surfing is, without a doubt, one of the most visually striking and fascinating sports. A fluid choreography that combines strength and delicacy, like a dance on the waves, gathers enthusiasts across the world's oceans. Yet, behind this image of freedom and connection with nature, the sport also carries contradictions. It is a symbol of outdoor life and respect for the ocean, but on the other hand, it is marked by territorial disputes over waves and by an environmental footprint that rarely receives the same attention given to its aesthetics. In times of climate crisis, this paradox becomes even more evident. Surfing depends directly on the health of marine ecosystems, the very ones most affected by pollution and global warming. This tension has been pushing a new generation of shapers, architects, and material designers to seek alternatives, from plant-based and recycled foams to the reuse of industrial waste, in order to reconnect the sport with its ecological dimension.
This curated selection of projects from the 2025 Venice Architecture Biennale explores regeneration as a deliberate, intelligent process rooted in the specific conditions of a place. For decades, the Biennale has been a testing ground for architecture's most urgent ideas, allowing designers, researchers, and institutions to present visions that address evolving environmental, cultural, and social challenges. This year's projects reveal how regeneration, whether of an entire coastal city, a disused industrial site, or a neglected public space, requires more than replacing the old with the new. It calls for a precise reading of existing contexts, the preservation of embedded knowledge, and the careful integration of contemporary needs.
The eight selected works show that regeneration can emerge from multiple starting points: reactivating heritage through adaptive reuse, restoring ecological systems as part of urban planning, developing open and modular strategies for social housing renewal, or layering technological innovation onto historically rooted practices. While the scale of intervention varies, each project demonstrates a sensitivity to what is already there and existing, be it material resources, urban patterns, or cultural memory, and a willingness to work with these assets as catalysts for transformation. Together, they suggest that regeneration must start somewhere, and that its success lies in balancing innovation with the intelligence of what already exists.
In 2020, in the midst of the first wave of lockdowns due to the pandemic, the municipality of Amsterdam announced its strategy for recovering from this crisis by embracing the concept of the “Doughnut Economy.” The model is developed by British economist Kate Raworth and popularized through her book, “Doughnut Economics: Seven Ways to Think Like a 21st-Century Economist”, released in 2017. Here, she argues that the true purpose of economics does not have to equal growth. Instead, the aim is to find a sweet spot, a way to balance the need to provide everyone with what they need to live a good life, a “social foundation” while limiting our impact on the environment, “the environmental ceiling.” With the help of Raworth, Amsterdam has downscaled this approach to the size of a city. The model is now used to inform city-wide strategies and developments in support of this overarching idea: providing a good quality of life for all without putting additional pressure on the planet. Other cities are following this example.
Germany's contribution to the 19th Venice Architecture Biennale 2025 exposes visitors physically and psychologically to the future urban climate: a STRESSTEST that makes the need for immediate action palpable. The exhibition takes a clear stance: climate change is an unstoppable reality, and the measures taken so far are inadequate. It presents a scenario in which climate change manifests globally through rising temperatures, extreme weather, and sea level rise, with its effects directly felt at a local level: urban spaces suffering from heat stress. Curators Nicola Borgmann, Elisabeth Endres, Gabriele G. Kiefer, and Daniele Santucci have designed an exhibition to highlight the impacts of global warming on urban life in an urgent call to action, emphasizing that this reality threatens urban social life, productivity, and the health and survival of citizens.
The Deutsches Architekturmuseum (DAM) in Frankfurt has launched its new exhibitionArchitecture and Energy: Building in the Age of Climate Change on June 14, which will be open to visitors until October 5, 2025. Developed in collaboration with engineer and sustainability advocate Werner Sobek, the exhibition explores the intersections of architecture, energy, and climate, focusing on the environmental impact of the built environment and the role of architecture in mitigating climate change. By framing architecture as both a challenge and an opportunity in the context of the climate crisis, the exhibition seeks to contribute to a broader shift in thinking, one that positions design as a vital component of a sustainable future.
NDSM Lusthof / Studio Ossidiana. Image Courtesy of Studio Ossidiana, Riccardo de Vecchi
As climate instability reshapes design priorities, architecture is increasingly drawn into ecological debates not as a spectator but as a participant. Among the concepts gaining traction is rewilding, a practice rooted in the restoration of self-sustaining ecosystems through the reintroduction of biodiversity, the removal of barriers, and the rebalancing of human presence in the landscape. Though often associated with conservation biology, rewilding also opens up new spatial and architectural imaginaries — ones that challenge conventional notions of permanence, authorship, and use.
Cities today are being reimagined as living, evolving organisms, combining digital intelligence, ecological systems, and new materials to shape radical futures. At Carlo Ratti's "Intelligens. Natural. Artificial. Collective." biennial, over 750 participants challenge established boundaries between architecture, landscape, and technology. Several conceptual projects showcased in the main exhibition challenge conventional boundaries between architecture, landscape, and technology. From bio-adaptive urban systems and Martian water-based settlements to immersive symphonies of satellite data, these works collectively envision new models for cohabitation, resilience, and planetary awareness.
This month's Unbuilt selection presents six speculative projects, presented as part of the 2025 Venice Architecture Biennale exhibition, as provocations for rethinking the future of cities and human settlement. While some proposals transform architecture into self-sustaining, living infrastructures, others explore how data and sensory interfaces can redefine our relationship with natural and urban environments. Together, they offer a cross-section of how architects and designers are using unbuilt work to imagine new possibilities for life on Earth and beyond.
Chicago Fire FC soccer stadium. Image Courtesy of Gensler
From Milan's Scalo Farini to downtown Chicago, and from the Tuscan countryside to the UK's retrofit initiatives, recent announcements demonstrate how architecture is evolving in response to climate goals, cultural identity, and urban transformation. Herzog & de Meuron's new headquarters for UniCredit will anchor one of Europe's largest redevelopment sites with a focus on sustainability and workplace innovation, while Gensler's stadium design for Chicago Fire FC aims to redefine the U.S. matchday experience as part of a major waterfront development. In Tuscany, Alvisi Kirimoto's Sapaio Pavilion merges agricultural production with architectural sensitivity, and in the UK, RIBA and The King's Foundation are advancing retrofit as a national agenda. Meanwhile, finalists including MVRDV, Heatherwick Studio, and Mecanoo are advancing in an international competition to create a climate landmark intended to inspire large-scale behavioral change. This edition of Architecture Now brings together diverse yet interconnected efforts to shape how architecture can support long-term ecological, cultural, and civic impact.
Extreme heat is one of climate change's most urgent and rapidly growing consequences, especially in cities. Urban areas are particularly vulnerable because they trap heat in building materials and urban streets, creating dangerous conditions for residents. As temperatures continue to rise and heat waves lengthen, cities are grappling with how to remain livable in the face of this intensifying threat.
