A carbon neutral building is achieved when the amount of CO2 emissions is balanced by climate-positive initiatives so that the net carbon footprint over time is zero. Considering their unmatched ability to absorb CO2, planting trees is often viewed as the best carbon offsetting solution. But as cities become denser and the amount of available horizontal space for green areas drastically reduces, architects have been forced to explore other approaches. Therefore, to address these climatic challenges and connect people to nature, exterior green walls have become a rising trend in increasingly vertical cities. Even if there is research to claim that these can positively impact the environment, many question if they can actually contribute to a carbon neutral architecture. Although the answer may be quite complex, there seems to be a consensus: green walls can be effective, but only through good design.
Advances in biotechnology and material science are opening new material opportunities, with the potential of fundamentally changing the connection between the built environment and the natural world. Building materials and construction account for 11% of greenhouse gas emissions. The AEC industry can contribute to curbing climate change in the following years, and the re-evaluation of commonplace building materials is one of the most critical steps. Bioengineered materials, which grow, produce energy, self-heal, are the next frontier in biology and material science and potentially a path towards a new kind of architecture. Although innovation in these fields is still far away from mainstream commercial use, it promises to dramatically change the image of the built environment.
It is crucial to consider the future environmental impact of everything we create. Climate change remains high on the global agenda, and every industry must take part in the goal of reaching Net Zero. One of the more challenging industries concerns construction, which plays a vital role in the process of decarbonization and is constantly encountered with challenges to become greener. Therefore, it demands innovative techniques and development of data to find new and sustainable processes. One solution is to introduce and design both cleaner and more efficient materials. Bricks are a good example, as they can be used in building constructions to ensure a circular process and minimize carbon emissions, being an extremely durable material that can be produced with more sustainable techniques.
While circular economy is often discussed in relation to the architectural object through the lens of material recycling, design for disassembly, and material passports, the framework is most fully enacted at the neighbourhood and city scale. Whether it is visions of circular communities that hint at some level of self-sufficiency or policies set in motion by cities, urban-scale projects exemplify the guiding principles of the circular economy, providing a glimpse into what a fully-fledged version of it might look like. The following explores the strategies used in circular urban environments, from architecture and construction materials to energy production, waste management and food production, as well as the processes and operations that govern these designs, providing insights into the conditions that inform circularity.
Parque Manancial de Águas Pluviais / Turenscape. Imagem cortesia de Turenscape
According to the architect and researcher Patrícia Akinaga, ecological urbanism emerged at the end of the 20th century as a strategy to create a paradigm shift with regard to the design of cities. With this, urban projects should be designed from the potential and limitations of existing natural resources. Unlike other previous movements, in ecological urbanism architecture is not the structuring element of the city — the landscape itself is. In other words, green areas should not only exist to beautify spaces, but as true engineering artifacts with the potential to dampen, retain and treat rainwater, for example. With ecological urbanism, urban design becomes defined by the natural elements intrinsic to its fabric.
As revolutionary as the construction sector may seem nowadays, it currently accounts for nearly 40% of the world’s carbon dioxide emissions, 11% of which are a result of manufacturing building materials such as steel, cement, and glass. Fast forward a couple of years later, after a life-changing global pandemic and indisputable evidences of climate change, CO2 emissions are still on a rise, reaching a historical maximum in 2020 according to the 2020 Global Status Report for Buildings and Construction. Although a lot of progress has been made through technological advancements, design strategies and concepts, and construction processes, there is still a long way to go to reduce carbon emissions to a minimum or almost zero in the development of built environments.
“If you’re a painter, you need a canvas. If you’re a sculptor, you need marble or plaster. And if you build a house, you need a piece of land.” Welcome to the wonderful world of Not Vital, where the Swiss multi-faceted artist shows us his sculpture park, foundation, and castle in this video.
Louisiana Channel meets Not Vital in his studio in Sent, the town in Switzerland where he grew up and one of the places where he still lives. Building places to live have been with him since childhood: “My first work was more related to trying to build a house or a habitat. The first one was when I was only three years old in 1951. There was so much snow that my brother and I built a tunnel,” he says and continues: “I think that it was the first time I realized that I like to build my own habitat. Even though it was much more comfortable to live in the house, I spent the day in the tunnel. I remember the light, the smell of the snow. I just felt great.”
HANNAH Office is a US-based experimental research and design studio whose work focuses on advancing architecture and contemporary construction practices by examining the possibilities of new digital routines and fabrication technologies. Selected as one of Archdaily's Best New Practices of 2021, HANNAH Office was founded in 2012 by Leslie Lok and Sasa Zivkovic and constitutes a platform for exploring technology and material methods across a variety of scales, from furniture to urbanism in search of new design outcomes.
In a new exhibition at AEDES Architecture Forum in Berlin, Norwegian architecture firm Mad arkitekter showcases four examples of sustainable architecture, stressing the importance of collaboration and cross-disciplinary for achieving climate goals. On view through until March 10, Mad About Dugnad – Work Together, Build Better echoes the Norwegian tradition of "dugnad", which refers to community solidarity towards achieving a common goal, a key concept in creating solutions for a sustainable future.
Compact city refers to the urban model associated with a more densified occupation, with consequent overlapping of its uses (homes, shops and services) and promotion of the movement of pedestrians, cyclists and public transport users. Amsterdam and Copenhagen are known examples of such a model.
Urban Radicals is a design collective based in London, founded in 2019 by Era Savvides and Athanasios Varnavas. The practice operates at the intersection of multiple disciplines, exploring public space and the notion of collectivity across a variety of scales, contexts and design expressions. One of Archdaily's Best New Practices of 2021, Urban Radicals shrinks and grows organically through the projects, dissolving the boundaries between diverse fields of knowledge and circumventing traditional office structure to integrate a multiplicity of perspectives within architecture.
Early last week, the European Commission and the Fundació Mies van der Rohe announced the 40 shortlisted projects of the EU Mies Award, a prize that commends excellence in architecture, highlighting its contribution to sustainable development. In this context, and two years after the European Parliament voted to support the Green Deal, we review the steps taken by the EU in 2021 towards achieving its sustainability goals and shaping a resilient built environment.
With its quantifiable objectives and measurable performance, sustainability often passes as a technological challenge. Its primary language is that of data, equipment, and engineered systems, most often translated into a hyper-technologized layer hidden within a design upholding pre-existing aesthetic norms. As architecture is the image of society at one moment in time, how does the focus on sustainability translate into architectural language, further legitimatizing the efforts to establish an equitable relationship with the environment? Architecture serves as an expression of attitudes, and since sustainability has become a fundamental value, it is worth looking at whether or not it has produced an aesthetic transformation.
MVRDV has been commissioned by the Armenian non-profit organization DAR Foundation for Regional Development and Competitiveness to develop a masterplan that will transform Gagarin Valley's 34,000-hectare area into a more sustainable and ecologically diverse land. With the help of over 10,000 plant species, innovative facilities, and additional 12,000 housing units, the valley is set to become an ideal community for sustainable agriculture and ecotourism.
In December, the European Commission adopted several proposals that put the transport sector on track for a 90% reduction in carbon emissions, moving a step further in implementing the European Green Deal. The initiatives seek to increase rail transport, encouraging long-distance and cross-border rail travel, support the roll-out of charging points for electric vehicles and alternative refuelling infrastructure and further develop multimodality.
Casa Collage / S+PS Architects. Image Cortesia de S+PS Architects
Reform and adaptation of spaces represent a significant parcel of projects ordered to architecture firms, and reuse of preexisting structures is not newness. Functions and needs change over time, therefore adaptations are required to meet new demands. However, no matter how much the maintenance of a building is, in most cases, preferred in economic and ecological sense to its demolition and a new construction from the beginning, the logic of the reuse of a space does not usually extend to its parts that become, thus, rubble.
The climate crisis has been one of the focal points of 2021, both within political discourse and the architectural field, accompanied by a newfound acknowledgement of the issue's severity. Over the past year, the IPCC report revealed the severe consequences of inaction, while COP26 and G7 summit resulted in an insufficient commitment to immediate and palpable measures. The AEC sector, responsible for a staggering 39% of global greenhouse gases, can bring a significant contribution to curbing climate change and the following looks at the decarbonization efforts of 2021 that target this industry.
As the effects of climate change intensify across the world, the AEC industry is shifting toward green building to effectively address the climate crisis. In 2020, members of The American Institute of Architects (AIA) overwhelmingly approved a resolution making environmental stewardship the organization’s top priority. Since then, steady progress has been achieved to develop a Climate Action Plan, evolve the Framework for Design Excellence, and increase participation in the 2030 Commitment. The building and construction sector is responsible for 36% of energy consumption, 38% of energy related carbon emissions, and 50% of resource consumption globally. These percentages are expected to double in total footprint by 2060, exacerbating the negative effects of climate change on the environment. The Intergovernmental Panel on Climate Change (IPCC) 2021 Report warns of increasingly extreme heatwaves, droughts and flooding, and a key temperature limit being broken in just over a decade. The world must act fast to avoid these catastrophic events, and decarbonizing the built environment is a major step in the right direction.
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