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33rd edition


“Climate change is one of the world’s most pressing challenges. Human emissions of greenhouse gases – carbon dioxide (CO2), nitrous oxide, methane, and others – have increased global temperatures by around 1℃ since pre-industrial times.

A changing climate has a range of potential ecological, physical and health impacts, including extreme weather events (such as floods, droughts, storms, and heatwaves); sea-level rise; altered crop growth; and disrupted water systems. The most extensive source of analysis on the potential impacts of climatic change can be found in the 5th Intergovernmental Panel on Climate Change (IPCC) report.2

To mitigate climate change, UN member parties have set a target, in the Paris Agreement, of limiting average warming to 2℃ above pre-industrial temperatures.”


Hannah Ritchie and Max Roser (2020) - “CO₂ and Greenhouse Gas Emissions”. Published online at Retrieved from: ‘’ [Online Resource]



Without consensus, COP25 reaches minimum agreement on climate change...

After two weeks of negotiations, the conference agreed to urge countries to increase their targets to reduce greenhouse gas 

emissions next year, which is essential for trying to contain warming below + 2 ° C but has not issued any strong signal that it will 

intensify and accelerate climate action. 


climate changes

global warming

green buildings

greenhouse gases





Theme: Green Tower



With this theme, we intend to rethink the current construction. The green tower will be a green building, (also known as a sustainable building). We refer to the structure and application of environmentally responsible processes that make it efficient throughout its life cycle: from planning to design, construction, operation, maintenance, renovation, and demolition.

-Housing Population: 3000 inhabitants minimum ( you are free to distribute for different typologies ) 

-Materiality - Eco-friendly materials should be used with a low ecological footprint.

-Height - There are no limits to the height of the building. 

-Areas - not defined 

-You can add the program that you consider relevant. 




1st Place


Team: Aleksandra Wtulich, Weronika Majchrowicz, Sylwia Marczyk, Joanna Cieślikowska

City: Warsaw

Country: Poland

2nd Place


Team: Victor Gentin, Myriam Eichel, Matteo Sandro Violante

City: Paris

Country: France

3rd Place


Team: D Lee, Yiyan Wang, Zaichen Wu

City: Beijing

Country: China

Honorable mentions
Honorable Mentions


Team: Jonás Gómez, Rodrigo Vergara

City: Santiago do Chile

Country: Chile



Team: Anton Panchenko, Tatiana Ilina

City: Krasnoyarsk

Country: Russian Federation



Team: Alicja Rudnicka, Agata Wtorkowska, Aleksandra Sułkowska, Bartosz Krajewski

City: Warsaw

Country: Poland



Team: Nicole Serban, Daria Frunza, Razvan Domnica, 

City: Bucharest

Country: Romania



Team: Simon Obriot, Bruno Schnoebelen

City: Strasbourg

Country: France



Team: Ademola Adechoubou, Riley Studebaker

City: Blacksburg

Country: United States



Team: Francesco Maria Fratini, Marco Padovani

City: Venice

Country: Italy

Final Comments
Final Comments

24H competition 33rd edition – CO2




1st PLACE - ID000120:

“If the idea of greedy real estate generated from vertical concentration, let the combat take place in the same formal way. The vertical structuring of elements of architectural character that eliminate the residues of civilization in the form of new Environmental wealth can be a significant contribution of architecture, without the formal neutrality of engineering rather dignifying the built landscape." Mário Chaves, arch.


" This proposal stood out from the other towers we received, for having a coherent and feasible structural design, in addition to being formally harmonious.
Interesting is the concept of a growing building based on the quantities of waste and material that can be reused. Also pertinent is the choice of cities based on their pollution index. Excellent job! " 
Lua Nitsche, arch.


“The progressive implementation, the conceptual investigation, and the concern with the materiality life cycle used are the main aspects highlighted in the proposal." Joanna Helm, arch.


“That´s a consistent proposal with good previous research on sustainability. Innovation in the construction process is presented as a path to be taken and not as a final destination." Rui Oliveira, arch.

" Drawing the idea from a simple natural analogy -the growth of a tree-, the project responds to the problem of climate change through mitigation: a tree tower that both provides dense housing and cleans the air. 

The proposal deserves appreciation with its innovative approach and upscale graphic quality." Duygu Tuntas, arch.

2nd PLACE - ID0001360:

"Metamorphosis is a chimera ideal of nature, to transform without losing its character, and in a civilizational will add value. A fundamental principle of economics that architecture writes with power; the whole is always more than the sum of its parts. Metamorphose Co2 into O2 into an architectural formal and functional element coherence, which Babel adjusted to the purpose, is, in itself, an essential value for society." Mário Chaves, arch.

“This project stood out for presenting two strong concepts:
1. the concept that architecture is not a disposable product, it needs to last.
2. The idea of human construction must also consider other living beings on planet Earth. The illustrations are very beautiful. The image of the building as a mountain, as part of the landscape, and no longer as an object, is very thought-provoking, despite the difficulties to be built." 
Lua Nitsche, arch.


​​“The project combines sustainability with durability and the ability to reuse and adapt space in an original and innovative way with an environmentally responsible concept." Joanna Helm, arch.

“Architecture is presented here as the symbiosis between material construction and the sharing of space by nature. The constant structural change transports us to a different experience every day." Rui Oliveira, arch. 


“The design idea of the proposal is quite notable and original in embedding all its programmatic components within a hill-like-shell structure that is reserved for the biosphere to extend from the ground to the top.

The approach is simple yet inspiring. Congratulations!" Duygu Tuntas, arch.


3nd PLACE - ID0001180:

" The vertical principle of functional efficiency in architecture promotes values that allow aiming for new resolutions of unusual functions. Promoting the renewal of spent air in architectural form is urgent. Not being able to cede the power of form to the mere interests of engineering and technique and technology, it is essential to legitimize architecture as an entity of consensus and agglutination of social interests, the transversal and global entity of the construction of urbanity." Mário Chaves, arch.


“Among the various works we received with proposals for the ocean, this was the best example and scope. Although it has a dose of utopia, the project highlights technical alternatives that seem viable and feasible. The Tuvalu hypothesis is very pertinent to create a link with the reality of our moment. Beautiful formal design and successful images give high credibility to applied solutions." Lua Nitsche, arch.


"The proposed solution partly contemplates the competition guidelines, emphasizing the energy infrastructure as housing and services.

However, as many of the water projects are utopian and make the feasibility of the project minimal." Joanna Helm, arch.


" We are facing an architectural proposal that assumes everyone's responsibility in this sustainability process, but with a vision of creative viability. It has shown that the beneficial resources for our planet exist in abundance." Rui Oliveira, arch.



“The tower provides both housing and open air activities; and infrastructure for passive energy production. It suggest an adaptation to the change in water level." Duygu Tuntas, arch.



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