The Green Institute
On June 5, 2026, World Environment Day, The Green Institute brought together researchers, planners, engineers and sustainability leaders from around the world to examine one of the defining challenges of our time: how rapidly growing cities can become more resilient, inclusive and sustainable in the face of climate change.
Cities are places of possibility. They hold our schools, hospitals, businesses, innovations and communities. Yet as they grow, they are also becoming increasingly exposed to flooding, extreme heat, pollution, ecological degradation, displacement and the consequences of poor planning.
That tension sat at the heart of the 7th World Environment Day Symposium, convened by The Green Institute on June 4–5, 2026 under the theme “Urbanization and Climate Change: Building Resilient Cities for a Sustainable Future.” The hybrid event brought together researchers, planners, engineers, policy thinkers and sustainability leaders to explore practical pathways toward climate-resilient urban futures.
““How do we build cities that protect people, restore nature, and prepare us for the future?””
From ambition to measurable action
Professor Patrick Paul Walsh, Vice President of Education and Director of the SDG Academy at the UN Sustainable Development Solutions Network, opened the discussion with a challenge that ran through the entire symposium: resilient-city ambition must be matched by measurement, evidence and accountability.
For Walsh, the post-2030 development conversation will require cities to show progress through indicators that can connect local action with national and global reporting. Green spaces, infrastructure upgrades and social programmes matter, but cities also need comparable data that demonstrates whether those interventions are improving wellbeing and reducing vulnerability.
Jacqueline Bleicher’s presentation translated that concern into the scale of the neighbourhood. Her climate-resilient sustainable urbanism framework treats neighbourhoods as practical units of transformation and proposes measurable targets for ecological reserves, urban greening, walkability, accessibility, mixed-use development, resilient buildings, and food, water and energy self-sufficiency. The combined message was clear: urban resilience must be designed so that success can be evaluated, not merely declared.
Resilience and sustainable development must advance together
Professor Ayyoob Sharifi examined the relationship between urban resilience and the Sustainable Development Goals, emphasizing that the two are interdependent. Resilience is more than the ability to bounce back after a disaster; it is a long-term framework for sustaining urban systems through shocks and change.
He also cautioned against approaches that protect infrastructure while overlooking poverty, hunger, inequality and weak institutions. Nature-based solutions can generate multiple co-benefits — from stormwater management and urban cooling to biodiversity and food security — but poorly designed interventions can also create land conflicts, displacement and new inequalities.
The implication is straightforward: a city cannot be called resilient if its climate gains are achieved at the expense of the people who are already most vulnerable.
Nature must be treated as urban infrastructure
Several speakers challenged the tendency to treat nature as decoration rather than essential infrastructure. Professor Alex Opoku argued that cities cannot decarbonize effectively without integrating biodiversity and nature-based solutions into urban development. Urban farms, green roofs, wetlands, permeable surfaces and community parks can absorb carbon, reduce heat, manage stormwater and strengthen food resilience.
Dr. Michael Osei Asibey extended this argument through the “green-blue city” paradigm. His presentation contrasted conventional planning — dominated by concrete, impermeable surfaces and fragmented governance — with a greener model built around urban forests, restored wetlands, green corridors, permeable surfaces, urban agriculture and participatory decision-making.
But the distribution of these benefits matters. Asibey highlighted what he called a justice gap: wealthier neighbourhoods often receive trees, parks and climate amenities first, even where vulnerability is greater elsewhere. His argument was that green investment should be targeted where risk is highest, not where political influence is strongest.
The Global South needs locally grounded urban transitions
The symposium repeatedly returned to the need for urban solutions that reflect local realities rather than imported templates. Professor Rexford Assasie Oppong used Duampompo in Ghana as a case study of peri-urban expansion at the rural-urban edge. Agricultural and ecological land is being converted into residential plots while waste systems, drainage and other municipal services struggle to keep pace.
His presentation showed how the loss of green infrastructure can undermine local food security, increase urban heat and intensify flood risk. He proposed locally grounded responses including transit-oriented development, partnerships with traditional leaders to protect greenbelts and farmland, and decentralized approaches to solar energy, waste management and drainage.
Professor Sylvester Mpandeli reached a related conclusion through the water-energy-food nexus. Sustainable urban development, he argued, requires a shift away from siloed planning toward coordination across sectors, institutions and scales. Physical infrastructure matters, but governance, community engagement, behavioural change and local knowledge often determine whether an intervention lasts.
Human-driven vulnerabilities are also a public-health challenge
Professor Emmanuel I. Ofoezie added an environmental-health perspective by examining human-driven urban vulnerabilities. His presentation linked deforestation, habitat loss, land degradation, urban sprawl, wetland encroachment, pollution and poor waste management to cities’ declining capacity to absorb and recover from climate shocks.
His mitigation priorities included afforestation and reforestation, protection of urban forests and wetlands, stronger environmental impact assessments, green infrastructure, pollution control, integrated waste management and more sustainable industrial practices. The broader lesson was that climate resilience cannot be separated from environmental quality and public health: degraded water, air, soil and ecosystems translate directly into greater urban vulnerability.
Governance is the connective tissue of resilience
Professor Susan Parnell argued that urban climate mitigation and adaptation efforts are still not keeping pace with real-world challenges, despite major advances in climate science, co-production and transdisciplinary research. Institutional barriers continue to limit innovation and the uptake of knowledge.
Her response was to put governance at the centre of urban climate action — linking design, finance, data, analytics, capacity building, partnerships and participation across multiple scales. Cities should be understood as complex “systems of systems,” not as collections of isolated projects.
Dr. Mattia Federico Leone offered a practical example of this integration through the Urban Design Climate Workshop approach. Work in Naples has combined stakeholder engagement and community co-design with collaborative mapping, scenario modelling and climate analysis of heat, flooding, energy consumption and renewable-energy potential. It demonstrates what becomes possible when climate knowledge is produced with cities and communities, rather than simply delivered to them.
Circular systems and responsible technology
Professor Anh Phan brought a circular-engineering perspective to the symposium, showing how waste streams can be transformed into materials, chemicals and energy rather than treated only as disposal problems. Her presentation also explored wastewater as a source of safe water, biogas and other recoverable resources.
The symposium’s paper presentations widened the conversation to digital infrastructure. Dr. Eugenio Ferrer Santiago III examined the environmental paradox of using artificial intelligence to make cities smarter while the data centres that power AI consume substantial electricity, water, land and infrastructure capacity. He proposed planning tools such as dedicated data-centre zoning, environmental disclosure, renewable-energy requirements and community benefit agreements.
A poster presentation by Khadijat A. Sulaimon and Prof. L. O. Odokuma brought the conversation back to urban water security. Their groundwater-quality assessment around petrol stations near the University of Port Harcourt identified evidence consistent with underground storage-tank leakage and highlighted the public-health implications of petroleum hydrocarbons and heavy-metal contamination. Their recommendations included continuous groundwater monitoring, stronger storage-tank standards and institutional collaboration.
Justice must remain at the centre
Dr. Jola Ajibade placed climate justice at the centre of the resilience debate. She described a century increasingly defined not by single disasters but by cascading risks: floods, heat waves, wildfires, droughts, infrastructure failure, migration pressures, conflict and economic shocks that interact and reinforce one another.
Her central question was not simply how cities adapt, but how they do so without creating new forms of harm. Adaptation projects can displace residents, reproduce inequality or shift risk from one population to another. Just resilience, therefore, must protect dignity, strengthen collective wellbeing and transform the systems that make some communities vulnerable in the first place.
That means residents — particularly people in informal settlements, coastal communities, women and young people — should not be treated only as beneficiaries or sources of data. Their knowledge should shape the design, implementation and evaluation of climate solutions.
Design for the hardest days, not only the ordinary ones
Dr. Yamini Meduri offered a practical test for resilience: can a city anticipate risk, absorb shocks, adapt, recover and learn? Her presentation emphasized that disasters expose the weakest connections between people, nature, governance, infrastructure and technology.
Resilience therefore needs to be embedded in master plans, zoning, infrastructure investment and urban policy before disruption occurs. Developers must design for future risks rather than historical patterns; technology should strengthen human systems; communities should participate in preparedness, not only recovery; and businesses must plan for continuity and shared responsibility.
A city may look successful on an ordinary day. The real test is how well it protects people when conditions are at their hardest.
A shared agenda for the cities ahead
By the end of the symposium, very different disciplines had converged around a remarkably consistent message: resilient cities must be measurable, inclusive, just, nature-positive, well-governed and rooted in the lived realities of the people who call them home.
They will require green and blue infrastructure, but also strong institutions. They will need sophisticated data, but also community knowledge. They will need new technologies, but also careful attention to their environmental footprint. And they will require investment not only in buildings and infrastructure, but in social cohesion, equity and institutional capacity.
The Green Institute closed the symposium with a call to move from knowledge to action — translating research into better planning, stronger policy, healthier neighbourhoods, accessible green spaces and safer futures for all. The future of sustainability will be shaped in our cities. The work of making those cities resilient must begin with the people who call them home.
Watch the Sessions and Access the Presentations
To watch the speakers' sessions and access the presentation slides, visit https://greeninstitute.ng/wed2026.