We’re Building a New York-Sized City Worldwide every month

We’re Building a New York-Sized City Worldwide every month

Dubai’s intricate roadways and futuristic skyline in this stunning aerial shot. by Kate Trysh via Pexels, despite the , which reckoned that the way is to go green thereafter in the built environment.

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We’re building a New York‑sized city every month. That’s worrying for our climate

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By Philip Oldfield, UNSW and William Craft, UNSW

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We’re Building a New York-Sized City Worldwide Aerial view of the island of Manhattan, New York City.
Art Wager/Getty

 

 

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Each of us needs of a roof over our head, classrooms to learn in and offices or space to work from.

To meet this unprecedented demand for new buildings, globally we’re constructing the equivalent of an entire New York City every month.

This provides us with vital infrastructure, but also generates an enormous amount of world-warming emissions.

So how can we build what we need, without harming our planet? Our new research provides some answers.

The need to build

Creating new buildings benefits communities, cities and countries, and eases housing pressure. That’s why Australia’s National Housing Accord is aiming to construct 1.2 million new, well-located homes between 2024 and 2029.

But this Australian effort is dwarfed by the 96,000 new and affordable homes needed worldwide every single day. Tragically, hundreds of millions of people around the world endure homelessness. One in four are living in harmful conditions.

However, construction comes with a climate cost. Each time we build, we use materials and construction processes that release large amounts of greenhouse gas emissions – known as “embodied carbon”.

To understand the scale of embodied carbon, picture a square metre of floor space. Constructing that square metre would release around half a tonne of greenhouse gas emissions. Now scale that up to building a whole New York-sized city every month!

Bricklayer laying another brick in a wall being constructed.
Conventional building practices can release huge amounts of greenhouse gas emissions.
Iryna Melnyk/Getty

What we studied

Our new study examined trends in office building construction in Australia. We currently have about 170 million square metres of office space across the country, and are set to build a further 100 million square metres by 2049.

To investigate what effect these buildings have on global warming, we modelled their greenhouse gas emissions. We measured both their embodied carbon and operating carbon – the emissions from everyday heating, lighting, cooling and appliances.

We found Australian office buildings are projected to release 138 million tonnes of greenhouse gas emissions between 2024 and 2049. This number is equivalent to the annual emissions of 36 coal-fired power stations. Given offices make up just 20% of all commercial buildings in Australia, this is only a fraction of our total urban emissions.

A mixed picture

Most surprisingly, operating emissions represented 85% of the total in 2024, but are set to drop to just 15% by 2049. This is because Australia is decarbonising our energy sector by shifting from fossil fuels to solar, wind and other renewables.

However, if we keep building at our current speed and scale, our annual embodied emissions will remain at similar levels. Compared to operating emissions, it’s more difficult to lower embodied carbon because many material supply chains rely on fossil fuels and carbon-intensive practices. The process of manufacturing cement, for example, is responsible for 8% of all global carbon dioxide emissions.

We also compared office building emissions in Australia with emission pathways that would limit the sector’s contribution to global warming below 1.5°C or 2.0°C. However, we found cumulative emissions from offices are over 40% above these pathways. This means office buildings will likely blow their carbon budgets within a matter of years. We found Tasmania – which runs almost entirely on renewable energy and has fewer office buildings per capita – is the only state or territory with annual emissions that sit consistently below the 1.5°C pathway.

Total greenhouse gas emissions of the Australian office sector, 2024-2049.
Adapted from Craft et al. (2006), CC BY

Cutting carbon

Our study measured several ways to reduce embodied carbon in office buildings, summarised below:

We found combining these strategies could reduce total emissions by over 47 million tonnes, putting the office sector far closer to the 2.0°C emissions pathway target.

These results show the importance of “sufficiency” measures, such as refurbishing existing buildings and constructing smaller, or fewer, new buildings.

Research shows sufficiency strategies work. Consider Sydney’s Quay Quarter Tower. This tower was originally built in 1976 but, by the late 2010s, was older and less useful. Rather than demolish it, architects 3XN and BVN extended the tower to the north and upcycled two-thirds of the original structure. This increased office space while saving around 8,000 tonnes of embodied carbon.

Three diagrams of the same office building, showing how it was extended using upcycled building materials.
Sydney’s Quay Quarter Tower was extended using upcycled building materials.
3XN

More work ahead

Our study suggests embodied carbon will, in the next decade, overtake operating carbon as the leading source of building emissions. This is problematic because most countries don’t impose limits on embodied carbon. As a first step, Australia must regulate embodied carbon emissions as other countries – including Denmark, Finland, France, the Netherlands and Sweden – have already done.

We should also offer incentives for the construction sector to refurbish older buildings. Several councils in the United Kingdom have adopted “retrofit first” policies, where builders must at least consider options for refurbishing buildings before simply demolishing or replacing them.

Our ever-growing global population demands millions of new homes, workplaces and community spaces. But to truly tackle climate change, we must find better ways to balance society’s need for new space with a commitment to curb emissions.The Conversation

Philip Oldfield, Head of School and Professor of Architecture, UNSW Built Environment, UNSW and William Craft, Senior Research Associate, School of Built Environment, UNSW

This article is republished from The Conversation under a Creative Commons license. Read the original article.

 

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UNESCO Director-General Reaffirms Commitment to Culture

UNESCO Director-General Reaffirms Commitment to Culture

Exterior view of Babel Restaurant featuring distinctive stone architecture and lush greenery. by Maryam Afana via Pexels

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UNESCO Director-General reaffirms the Organization’s commitment to Lebanon

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During his first official visit to Lebanon, UNESCO Director-General Khaled El-Enany met with President Joseph Aoun, and members of the Lebanese Government to review UNESCO’s activities across education, sciences, culture, communication and information and discuss priorities to advance recovery efforts and long-term resilience.
UNESCO DG official visit in Lebanon

As Lebanon continues to face evolving emergencies UNESCO stands in solidarity with its people and recognizes Lebanon’s extraordinary cultural heritage. Our role is to work alongside Lebanese partners, guided by nationally defined priorities, to respond to urgent needs and advance sustainable development. Through our joint initiatives on education, heritage protection and information integrity, we aim to expand opportunities and social cohesion, and support an inclusive recovery that contributes to lasting peace for all

UNESCO Director-General
Khaled El-Enany UNESCO Director-General

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During his visit, the Director-General met with President Joseph Aoun, Speaker of Parliament Nabih Berri, Prime Minister Nawaf Salam, Minister of Culture Ghassan Salamé and esteemed members of the Government. The visit also saw the signing of a new Memorandum of Understanding with the Government of Lebanon, establishing a strengthened framework for cooperation through 2029.

Expand Education Recovery Efforts 

Thanks to a grant from the Global Partnership for Education (USD 1 million), UNESCO will reinforce government-led efforts to strengthen national education planning and build a more resilient education system. This new contribution from GPE brings UNESCO’s targeted assistance to emergency education response and recovery in Lebanon to USD 1.8 million, reinforcing efforts to restore learning and strengthen national capacities across the education sector. 

During a visit to Mohamad Shamel Public Mixed Elementary School in Beirut, the Director-General met students and teachers participating in UNESCO-backed recovery activities. The visit highlighted the flagship six-week Summer Learning Programme, which is helping students catch up on learning missed due to the conflict and displacement, while providing psychosocial support ahead of the new school year.

Since 2023, UNESCO has trained over 4,000 teachers in digital and flexible learning approaches, reaching more than 10,000 students in the most affected regions. 

Increasing efforts for Lebanon’s heritage

The Director-General visited the World Heritage site of Tyre recently added to the List in Danger, where he announced USD 100,000 from the Heritage Emergency Fund. This will advance emergency support to assess damage, stabilize vulnerable structures, protect archaeological remains and mosaics, train young Lebanese heritage professionals, and underpin community-led recovery efforts to safeguard and revitalize one of Lebanon’s most iconic cultural sites.

At Khan Al-Askar in Tripoli, the Director-General acknowledged the potential of the site to serve employment-oriented skills development and TVET programmes. The Director-General visited also the World Heritage Property Rachid Karami International Fair and underscored UNESCO’s support for the conservation of this iconic modern architectural site including through the implementation of a Conservation Management Plan, funding for the restoration of the Water Tower (76.000 USD), and capacity-building for national experts.

Commitment to information integrity and media freedom

The Director-General welcomed the launch on 13 August of the National Campaign against Hate Speech, led by the Ministry of Information, with the support of UNESCO. He also announced a new contribution from the LOOPS Foundation to the Libraries for Resilience initiative. Together with the MCN Build Foundation and Norway, the initiative has now mobilized USD 650,000 to expand access to reliable information, strengthen community resilience, and enhance public library services across Lebanon.

The Director-General also acknowledged the adoption of a new Media Law by the Lebanese Parliament. UNESCO stands ready to continue supporting related reforms and implementation of the law in order to ensure freedom of expression, media independence, and the safety of journalists in line with international human rights standards.

Partnerships and call for international mobilization

The Director-General thanks all of UNESCO’s partners and donors, and reiterates UNESCO’s appeal for increased international mobilization for the new UNESCO Action Plan for Lebanon (2026–2028), which structures UNESCO’s response around three pillars: monitoring, coordination, the provision of emergency assistance to lay the ground for sustainable recovery, and long-term prosperity.

What If Our Cities Were Designed for Both People and Nature?

What If Our Cities Were Designed for Both People and Nature?

Aerial shot of Fortaleza’s urban landscape blending with sprawling forested areas. by Nino Souza via Pexels

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What if our cities were designed for wildlife as well as people?

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By Saman Sobhani, Aberystwyth University

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Common swift flying at sunset
shutterstock.
Paul Sawer/Shutterstock

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On a warm evening in May, swifts scream over rooftops, chasing insects above the traffic. A fox slips along a garden wall while gulls squabble on a supermarket roof. We tend to treat these animals as visitors. But they’re residents too, living alongside us in places designed for people.

My recent research argues this needs to change.  Instead of asking how nature can make cities better for humans, urban planners should consider what cities owe the many species that already live in them.

More than half the world’s population now lives in urban areas, while cities continue to expand into wildlife habitats.

In the UK, swifts provide a distinct example. They nest in gaps under eaves and roof tiles, which can disappear when older buildings are demolished, re-roofed or insulated. UK swift numbers have fallen by around 60% since 1995. In 2021, the species was added to a list of birds at greatest risk of extinction.

The issue isn’t simply how we can make cities greener. It’s who we think cities are for.

For my new study, I compared approaches to incorporating nature into urban planning, including environmental offsetting, sustainable development and nature-based solutions such as green roofs, street trees and wetlands. I also examined cases where governments and courts have given species and ecosystems a different status in decision-making.

The pattern I found was striking. These approaches have become increasingly good at showing how nature benefits people, but much less willing to ask whether other species have interests of their own.

Trees are planted because they cool streets. Wetlands are protected because they can hold floodwater. Parks are funded because they improve our health.

All of those benefits are important. But they can also leave nature looking like a service provider for people. If a tree no longer provides enough shade, or a wetland becomes more valuable as development land, what happens to the argument for protecting it?

This is where the idea of “multispecies justice” comes in. It starts from a different premise, where animals, plants and ecosystems are not simply amenities that provide benefits to people. They are co-inhabitants of places we share.

That changes the question urban planning asks. Instead of only considering what nature can do for us, it asks what responsibilities we have towards the species with which we live.

What would change?

This doesn’t mean turning cities into wildlife reserves. It can involve small changes to decisions that shape urban life.

For example, before restoring a river, planners could consider whether the proposed changes are likely to create conditions in which fish and frogs can thrive. They could then assess the project not only on its effects on flooding or visitor numbers.

A development could be designed around established wildlife routes rather than treating them as obstacles to mitigate later. Environmental assessments could consider what a new road does to the routes used by badgers, bats or other animals, alongside its effects on drainage and emissions. Some places might be left undisturbed during breeding seasons.

There are already examples of governments experimenting with this type of approach. In New Zealand, the Whanganui River was recognised as a legal person in 2017, with guardians appointed to represent its interests. Colombia’s Atrato River was recognised as a subject of rights in 2016, with a similar system of guardianship.

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A view of the Whanganui River looking lush and green.
The Whanganui River in New Zealand.
Robert Harding Video/Shutterstock

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These cases aren’t straightforward solutions. The rights granted to rivers still have to operate within existing political and legal systems. Research suggests implementation in Colombia has been uneven.

But they illustrate a different way of thinking. Nature doesn’t have to justify its existence solely through the benefits it provides to people.

The idea is also beginning to appear in more conventional urban planning. Barcelona has built green corridors linking parks to the hills beyond the city so that wildlife can move through it.

In the UK, Scotland has become the first nation by law to require swift bricks in new buildings. These hollow bricks contain a nesting cavity and cost roughly £30 each. But its significance is larger than the brick itself. It treats the presence of another species as something that should be considered when we design buildings, rather than as an unexpected problem to deal with afterwards.

In England, efforts to require swift bricks by law were rejected by the House of Lords. The UK government has instead pursued their inclusion through planning policy and development requirements.

A different way of designing cities

None of this makes urban planning simple. Species can have competing needs, and protecting wildlife can sometimes conflict with other environmental or social goals.

A protected predator might threaten a vulnerable population. Preserving a habitat might complicate a development intended to reduce overheating. There won’t always be a simple answer.

But those conflicts already exist. The difference is that they’re often resolved using systems that give human interests the greatest weight. Multi-species justice asks us to make those choices more explicit.

Cities are already shared habitats. The birds nesting in our roofs, the insects in our gardens, the bats above our streets and the organisms in our soils are not simply passing through. They are part of urban life.

The challenge for planners is to decide whether they’ll continue to design cities primarily around human needs, adding nature where it provides a benefit, or begin to treat the flourishing of other species as a legitimate consideration in its own right.The Conversation

Saman Sobhani, PhD Candidate in Environmental Economics, Aberystwyth University

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This article is republished from The Conversation under a Creative Commons license. Read the original article.

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Bedouin Craft in Contemporary Infrastructure Influence

Bedouin Craft in Contemporary Infrastructure Influence

Across the Gulf, Bedouin heritage often enters architecture first as an image. Airport terminals recall tent silhouettes, visitor centres incorporate woven screens, and pavilions reinterpret traditional textiles as decorative façades. These references have become a familiar visual language for expressing regional identity. They also risk reducing one of the world’s most sophisticated vernacular building traditions to an architectural motif. Long before the Bedouin tent became a cultural symbol, it was an environmental technology: a lightweight, adaptable structure capable of creating comfort in one of the planet’s most demanding climates. What contemporary infrastructure may inherit is not the tent’s silhouette, but the construction intelligence woven into it.

The Bedouin black tent, traditionally woven from goat hair by women practising Al Sadu weaving, demonstrates a remarkably precise understanding of climate and material. The material works with desert conditions instead of resisting them. Goat-hair fibres swell when exposed to moisture, tightening the weave to resist rain, and loosen as they dry, allowing air to circulate during intense heat. Individual textile strips are woven separately before being stitched into larger membranes, enabling damaged sections to be repaired or replaced without dismantling the entire structure.

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Museum of Moroccan art in Rabat – Zemmour tent 1989. Image © JopkeB under the Creative Commons Attribution-Share Alike 4.0 International license

Supported by poles and tensioned ropes instead of rigid walls, the tent remains lightweight, portable, and adaptable to changing patterns of movement. Filtered shade, moving air, and permeability create comfort without complete enclosure. Recognised by UNESCO as an important element of intangible cultural heritage, Al Sadu represents far more than a craft tradition; it contains a sophisticated understanding of environmental performance achieved through material knowledge rather than mechanical technology.

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The Western Hajj Terminal of King Abdulaziz International Airport. Image © Diriyah Biennale Foundation

For decades, these ideas were discussed mainly as vernacular architecture. The Hajj Terminal changed that. Completed in 1981, the Hajj Terminal at King Abdulaziz International Airport in Jeddah transformed the environmental logic of the Bedouin tent into one of the twentieth century’s most ambitious pieces of transport infrastructure. Beyond borrowing the tent merely as a cultural image, architects at SOM explicitly described the project as a reinterpretation of the Bedouin tent, translating its lightweight construction into a vast cable-supported tensile membrane system. The result was not simply a dramatic roof, but an entirely different approach to accommodating people in an extreme climate.

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Hajj Terminal at King Abdulaziz International Airport. Image © Jay Langlois | Owens-Corning

The terminal’s celebrated PTFE-coated fabric canopy stretches across hundreds of modular roof bays, creating expansive shaded spaces that remain naturally ventilated while accommodating the extraordinary seasonal demands of the annual Hajj pilgrimage. Unlike conventional airport terminals designed around permanently enclosed, mechanically conditioned halls, the Hajj Terminal accepts that comfort in the desert can emerge through shade, airflow, and openness. Millions of pilgrims occupy these spaces during peak periods before the infrastructure returns to a quieter operational rhythm for the rest of the year. In many ways, its spatial intelligence mirrors that of the Bedouin encampment itself: modular rather than monolithic, flexible rather than fixed, and organised around temporary but highly efficient occupation. The project proved that environmental knowledge developed at the scale of a family dwelling could also organise national infrastructure.

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Red Sea International Airport by Foster + Partners, Saudi Arabia. Image © Foster + Partners

Subsequent generations of Gulf infrastructure reveal an interesting shift. Explicit references to Bedouin architecture have become less common. The environmental strategies, however, continue to reappear. Foster + Partners’ Red Sea International Airport, for example, draws inspiration primarily from the surrounding desert landscape rather than Bedouin settlements. Its modular terminal clusters, lightweight roof structures, and carefully shaded circulation spaces are presented as responses to climate, energy efficiency, and future expansion rather than cultural symbolism. The result is unexpectedly familiar: lightweight structures, generous shade, modular growth and buildings that remain adaptable over time. The resemblance is less about influence than about arriving at similar solutions under similar climatic pressures. Faced with the same desert climate, architects repeatedly arrive at principles already embedded within Bedouin construction.

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Grimshaw’s Terra Sustainability Pavilion at Expo 2020 Dubai. Image © Expo 2020 Dubai

A comparable evolution can be observed in projects beyond transport infrastructure. Grimshaw’s Terra Sustainability Pavilion at Expo 2020 Dubai demonstrates how large roof canopies can function as environmental infrastructure rather than purely formal expression. The pavilion’s expansive shading system filters intense solar radiation while creating usable public space beneath it, reducing dependence on enclosed conditioned environments. Likewise, visitor facilities across AlUla and landscape projects such as the Wadi Hanifah Visitor Centre increasingly prioritise passive cooling, landscape integration, and filtered environmental conditions over iconic architectural form. These projects rarely resemble tents. What they borrow is the way tents work.

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Grimshaw’s Terra Sustainability Pavilion at Expo 2020 Dubai. Image © Expo 2020 Dubai

This distinction may appear subtle, but it fundamentally changes how architectural heritage is understood. Too often, discussions of regional identity focus on preserving appearances while overlooking the knowledge systems that generated them. Bedouin construction was never remarkable because tents looked distinctive. They were remarkable because they solved complex environmental problems using locally available materials, reversible construction, and extraordinary material efficiency. The lesson lies in understanding why weaving produced comfort, flexibility, and repair rather than copying its patterns.

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Camp Sarika / Amangiri + Luxury Frontiers. Image © Aman

As architecture confronts increasingly extreme climates, growing resource constraints, and more dynamic patterns of occupation, these lessons become newly relevant. Airports designed for fluctuating passenger volumes, temporary cultural events, disaster relief infrastructure, and rapidly expanding desert settlements all require buildings capable of adapting without excessive material consumption or mechanical dependence. Its principles of lightweight assembly, modular repair, passive environmental control, and climatic responsiveness align closely with many of the ambitions now driving sustainable architecture worldwide.

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Desert X AlUla 2024 Visitor Centre / KWY.studio. Image © Colin Robertson

The Hajj Terminal continues to resonate more than four decades after its completion, for its enduring significance lies in demonstrating that indigenous knowledge can operate confidently within contemporary engineering. It showed that tradition need not survive only through preservation; it can evolve through translation. Desert infrastructure will not become more regionally grounded by repeating the image of the Bedouin tent. It will do so by understanding the environmental intelligence woven into its construction.

This article is part of the ArchDaily Topic: The Architecture of Craft: Handmade Stories in a Digital Age.

 

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How to Assess and Address System-Level Physical Risks Wisely

How to Assess and Address System-Level Physical Risks Wisely

Scrabble tiles spelling out ‘risk’ scattered on a rustic wooden background, symbolizing uncertainty. by Markus Winkler via Pexels

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How to assess and address system-level physical risks

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Climate risk does not stop at the boundary of a building or facility.  An organization’s resilience is inseparable from the health of the surrounding communities, ecosystems, infrastructure, and supply chains.  Yet for many businesses, climate-related risks are still assessed too narrowly, often only at the level of individual assets. A more connected approach enables clients to better identify, assess, manage, and transfer system-level physical risks. The steps below can help clients begin to take that broader view.

What are system-level risks?

System-level risks are threats to the suppliers, customers, infrastructure, resources, ecosystem services, governments, regulators, capital providers, and communities that organizations depend on but do not fully control (see Figure 1).

Whereas asset-level risk is predominantly related to potential property damage and business interruption, systems-level risk is driven primarily by the threat of business interruption, with property damage as a secondary concern.

For example, a company may harden an asset against flooding or heat. However, if during an extreme weather event, transport links fail, the power supply is disrupted, workers cannot reach the site, or critical suppliers are impacted, the business is still exposed.

System-level risks are particularly important to consider in the built environment, where organizations depend on complex networks of infrastructure, labor, energy, water, logistics, public services, and local communities. In towns and cities, a heatwave, flood, or wildfire rarely remains purely a local physical hazard.

However, until now, these risks have often been underestimated. Traditional risk assessments tend to focus on physical assets because they are easier to model and more familiar to business leaders. By contrast, system-level dependencies are more diffuse. They cut across functions and stakeholders rather than sitting within a single team or budget. That makes them harder to own, harder to quantify, and easier to overlook.

01 | The Marsh Risk Climate Adaptation Framework: organizations should consider both asset- and system-level considerations

Practical steps to address system-level risk

Addressing these risks requires a broad approach. To build true resilience, organizations need to look beyond their own boundaries and actively engage with regulators, suppliers, peer organizations, and critical infrastructure providers.

As put forward in Marsh’s report, Addressing the system-level resilience gap, organizations can achieve this by taking a four-step approach: identify system dependencies, assess materiality, manage risk more effectively, and transfer residual risk where possible. This is an iterative process that should be embedded into location strategy, procurement, capital allocation, and enterprise risk management to support more resilient decision-making across the business.

Marsh has also developed practical checklists, available in the report appendix, aligned to each system-level climate risk that organizations operating in urban and industrial areas can use. Designed to be actionable, they provide a useful tool for risk managers and other risk owners across the organization.

Additionally, tools such as Marsh’s Insurance Enabler Framework can be used to identify where resilience measures can improve risk outcomes and where pricing pressure may point to deeper vulnerabilities.

Helping clients turn complex climate risk into informed action

In our work, we regularly encounter barriers such as climate risk being communicated in technical or scientific language that does not always resonate with senior decision-makers.

Another challenge is organizational fragmentation. In many businesses, climate resilience sits in silos — perhaps within sustainability, operations, risk, or business continuity — rather than being embedded across governance, capital allocation, procurement, and strategy. As a result, organizations may understand that system-level climate risks present a threat, but they do not always have a consistent way to translate that awareness into coordinated action.

At the same time, the benefits of resilience are often long term, indirect, or difficult to express in financial terms, while the costs are immediate and visible. As a result, system-level risk can appear less urgent than it truly is. Marsh’s framework and checklists provide clients with a practical way to turn this challenge into an effective response.

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