COP30: What is being discussed about sustainability in cities?

The COP30, held from November 10 to 21 in Belém (PA), consolidates itself as one of the most significant climate meetings of the decade. With a focus on cities and the role of urban spaces in mitigating the impacts of projects, the event brings together political leaders, researchers, and institutions to discuss the sustainable future of the planet.

More than a conference, COP30 establishes itself as a turning point: it is the moment to redefine strategies to confront the climate crisis and recognize cities as protagonists in the search for concrete and inclusive solutions.

How the COP30 programming works

(Tânia Rêgo/Agência Brasil/Divulgação)

COP30 is divided between two major axes: the Blue Zone and the Green Zone. Each one reflects an essential dimension of the climate debate.

In the Blue Zone, the international negotiations on the implementation of the Nationally Determined Contributions (NDCs) of Brazil under the Paris Agreement are concentrated. It is the space of diplomacy and global cooperation, where commitments are defined that directly impact the environmental policy of the signatory countries. In the Green Zone, the focus turns to domestic actions and the involvement of civil society, emphasizing the Climate Plan, which will guide Brazilian strategies to confront the climate crisis until 2035.

Priority themes include climate governance, innovation in urban systems, social justice, and the role of cities in the ecological transition. These debates reflect a growing understanding: urban centers concentrate the greatest challenges — and also the greatest opportunities to curb the advance of climate change.

Role of architecture and urbanism at COP30

(Tânia Rêgo/Agência Brasil/Divulgação)

Cities concentrate more than 70% of global greenhouse gas emissions, and about 39% of these emissions come from buildings — from final use to the so-called embodied carbon, emitted during the production and transport of construction materials. This data highlights the strategic role of architects, urban planners, and engineers in the global climate agenda.

During COP30, architecture is recognized as one of the key areas in building a sustainable future. Various organizations, associations, and offices have pressured for more stringent environmental goals, advocating low-impact construction practices and strengthening architectural resilience — especially in regions of the global south, which are more vulnerable to the extreme effects of climate.

Topics on sustainability in cities discussed at COP30

(Fernando Donasci/MMA/Divulgação)

On November 10 and 11, cities are at the center of the debates in the Brazil Pavilions at COP30, with a program highlighting the urgency of integrating sustainability, innovation, and social inclusion in urban policies.

Among the topics presented, the Ministry of Cities leads panels on peripheries and climate justice, exploring innovative solutions to reduce environmental inequalities. The Institute for Sustainable Pathways brings proposals for carbon credits from recycling, pointing to ways to decarbonize the urban economy through efficient waste management.

The City Hall of Recife addresses climate financing for resilient cities, while the Ministry of Environment and Climate Change discusses waste management and urban decarbonization. The Federal Court of Accounts presents the Climate Panel Brazil, a unique assessment of the climate actions of the public power.

Other panels will highlight the role of basic sanitation in climate resilience, the creation of green corridors and innovation, and the environmental recovery of industrial hubs, such as that of Cubatão, which has been reinventing itself with a focus on ecological transition. The complete program of the Brazil Pavilions, in addition to other useful information about COP30, is available on the Ministry of Environment and Climate Change website.