Every year on October 13, the International Day for Disaster Risk Reduction (IDDRR) draws attention to the ways communities can reduce exposure and vulnerability to hazards. Established by the United Nations in 1989, the day provides an opportunity to consider how governments, communities, and professionals can strengthen preparedness and resilience before disasters occur. For its 2026 edition, the United Nations Office for Disaster Risk Reduction (UNDRR) has selected "Resilience Starts at Home" as its theme, placing housing at the center of this year's campaign.
Reclaimed land is often presented as new ground: flat, available, and ready for architecture. It promises cities more space where space is scarce, allowing them to extend waterfronts and build cultural districts. Sometimes, these newly claimed lands may also develop into financial centers, create parks, and imagine futures beyond the limits of existing land. Yet reclaimed land is never simply land. It is an engineered surface, produced through fill, seawalls, drainage, and soil stabilization — a long-term negotiation with the water it claims to have displaced.
This makes reclamation one of architecture's most powerful and ambiguous spatial fantasies. On one hand, it offers freedom: a tabula rasa where streets and buildings can be planned almost from scratch. On the other, this apparent freedom conceals dependency. Made land must constantly prove itself as ground. It has to resist flooding, support foundations, grow trees, and hold public life above a terrain that did not previously exist.
The idea of a "Great Green Wall" designates a large-scale reforestation initiative undertaken specifically to halt desertification. Currently underway in Africa to prevent the advancement of the Sahara Desert and in China around the Gobi Desert, it is a landscape, agriculture, economic, and social development project in reaction to the rise of global temperatures, over-farming, and unsuitable land management. Both projects, currently underway, are intersectional initiatives involving governments from different countries, civil society organisations, and both individual volunteers and organised groups, guided by the idea of a unified response to global environmental issues through wildlife restoration. It is a large-scale, infrastructural application of a 'green' or 'wildlife corridor': a linear strip of vegetation or natural landscape that connects fragmented ecosystems and wildlife populations separated by human development on a continental scale.
"By 2050, almost every child in the world — nearly 2.2 billion children — will be exposed to frequent heat waves." UNICEF's warning is often read as a public health forecast, but it is also a challenge to architecture and the way cities are built. As extreme heat intensifies across Asia, Europe, and beyond, thermal comfort should not be reduced to merely an indoor service delivered by machines. Air-conditioning has become a life-support system for many cities, especially in dense, humid, and rapidly urbanizing regions. Yet to rely on it as the default answer is to treat heat as something that can simply be moved elsewhere (and in the process generating extra heat) — expelled from interiors into streets, service alleys, energy grids, and the atmosphere. Its expansion increases energy demand, produces waste heat, and reinforces unequal access to comfort.
Heat, however, does not stop at the human body. It reorganizes the wider urban ecosystem: trees struggle with compacted soil and radiant paving; birds and insects lose habitat when planting is reduced to decorative greenery; aquatic systems warm, microbial life shifts, and materials absorb and release heat long after the sun has set. Heat is not simply a climatic problem to be escaped indoors. It is an urban actor that reshapes public space, labor, mobility, planting, material choices, and the fragile relationships between human and nonhuman life.
European City Context. Image Courtesy of ReGreeneration
The ReGreeneration project, a Horizon Europe project led by Inetum and supported by C40 Cities, ARUP, Placemaking Europe, and several others, operates as an active collaboration with local governments, private companies, academia, and civil society organizations at the intersection of urban regeneration, green public spaces, and neighborhood-scale design. Its premise addresses how European cities are built and maintained and how they experience a changing climate, arguing that cities must fundamentally change to remain livable under accelerating climate pressures.
Urban masterplans remain an exploratory ground for unbuilt speculation, offering insight into how cities might recalibrate mobility, ecology, and collective life in response to accelerating environmental and social pressures. In this Unbuilt edition, submitted by the ArchDaily community, the selected projects bring together a range of large-scale proposals that examine urban centers, waterfront districts, infrastructural corridors, and cultural landscapes as spatial frameworks for reconnection and resilience. Rather than treating the masterplan as a rigid blueprint, these projects approach urbanism as an adaptive system shaped by climate, topography, infrastructure, and public space.
Across varied geographies, from Northern European town centers and Mediterranean coastal districts to Central Asian polycentric hubs and Gulf megacities, the proposals explore diverse architectural and urban strategies. They range from park-led civic transformations built over highway tunnels to elevated pedestrian networks above active transport systems, mixed-use blocks structured by historic planning logics, marina developments integrating environmental stewardship, and research-driven models for equitable landscape urbanization.
Cities around the world share a common goal: to become healthier and greener, supported by civic infrastructure that restores ecosystems and strengthens public life. The question is how to reach this. Global climate targets, local building codes, and municipal standards increasingly guide designers and planners toward better choices. Still, many cities struggle to translate these frameworks into everyday, street-level comfort and long-term ecological protection. What happens if the city is no longer treated as a traditional city, but as a national park?
National parks operate through systems of protection that treat land as a network of ecological relationships rather than a collection of isolated sites. They establish a shared baseline for what must be preserved, maintained, and made accessible over time. When this logic is applied to the urban environment, success can inspire pride and a sense of shared responsibility among designers, policymakers, and residents, fostering a collective commitment to health, habitat, and civic infrastructure.
January 26 marks the International Day for Clean Energy, an initiative aimed at raising awareness and mobilizing action for an inclusive transition from fossil fuels, such as coal, oil, and natural gas, to power generation systems with lower greenhouse gas emissions and fewer pollutants. The term "clean" signals a fundamental shift away from extractive, finite, and exhaustible energy sources toward systems based on renewable resources or on capturing energy embedded in natural processes. In a world grappling with climate change, clean energy plays an important role in reducing emissions and expanding access to reliable power. However, being labeled "clean" does not exempt these systems from the impacts associated with their production, deployment, and commercialization. In this context, architectural knowledge related to space, materiality, and habitation becomes relevant for supporting a transition toward energy systems that are sustainable over time. As stated by the United Nations, the science is clear: to limit climate change, reliance on fossil fuels must end, and buildings must be heated, lit, and electrified through clean, accessible, affordable, sustainable, and reliable power sources.
Public spaces remain some of the most dynamic sites for unbuilt architectural experimentation, revealing how cities and architects can imagine accessibility, gathering, and civic identity. In this curated Unbuilt edition, submitted by the ArchDaily community, the selected proposals examine parks, pedestrian corridors, cultural landscapes, and open-access urban environments that invite people to meet, move, rest, and participate in collective life. Rather than treating public space as leftover terrain, these projects position it as essential infrastructure—shaping urban health, memory, and social interaction.
Cities bring together the best and worst of the human condition. They concentrate opportunities for work, social networks, and cultural production, but they also expose deep social inequalities. Among the many forms of urban exclusion are limited access to transportation, housing, leisure, or safety issues. One form that is rarely discussed is thermal inequality. In lower-income neighborhoods, where there are fewer trees, parks, and permeable surfaces, heat accumulates and thermal discomfort dominates, resulting in higher energy consumption and health risks. As concern about the climate crisis grows, this discussion becomes more urgent: extreme heat is no longer just a climatic phenomenon but also a spatial expression of inequality.
Infrastructure has long defined the backbone of cities by linking people, landscapes, and economies through systems that often go unnoticed until they fail. Today, as global challenges demand more adaptive and human-centered responses, architects are rethinking what infrastructure can be: not just a framework for movement and utility, but a catalyst for ecological restoration, cultural continuity, and civic imagination. The following unbuilt projects, submitted by the ArchDaily community, explore this expanded role of infrastructure, where airports, bridges, industrial parks, and pedestrian networks become architectural expressions of connection and care.
Immersive Resilience Garden / Changyeob Lee + Studio ReBuild. Image Courtesy of Studio ReBuild
The concrete canyon of Melbourne's Degraves Street was once a stark service corridor in functional obscurity. Today, the narrow laneway now pulses with life beyond its famous café. Native grasses cascade from carefully positioned planters while small shrubs create cooling microclimates. Challenging traditional ecological design models, community-led approaches to biodiversity invite a reimagining of how architects, planners, and communities collaborate to develop biodiverse urban futures.
Titled "Chinampa Veneta", the Mexican exhibition for the 19th International Architecture Exhibition – La Biennale di Venezia seeks to promote reflection on how we inhabit, cultivate, and design the world we share. In the face of the global ecological crisis, the project draws attention to chinampas, an ancient Mesoamerican agricultural system with more than four thousand years of history. This ancestral knowledge, interweaving landscape, infrastructure, and technique, is reimagined in the context of the Biennale, activating a living environment within the city of Venice. The Mexican Pavilion consists of two "enactments," one located in the Arsenale and the other built on water.
