Sustainability

Nature is the central strategy for long-term survival

Thai landscape architect Kotchakorn Voraakhom explains why we urgently need to reintegrate cities with nature if we want to survive the consequences of climate change.

  • 日付
  • 読み取り時刻 5 minutes

Thammasat Urban Rooftop Farm outside of Bangkok - one of Kotchakorn Voraakhom's signature projects - is shaped by water, not against it, showing how nature-based design can help build resilient cities. © LANDPROCESS

Summary

  • Climate resilience depends on a fundamental mindset shift: away from controlling nature towards working with dynamic, living systems that absorb, adapt, and regenerate.
  • The future of cities lies in coexistence with water - designing urban spaces that can flood, store, and reuse it, rather than simply pushing it away.
  • Nature-based solutions unlock multiple benefits at once, tackling flooding, heat, biodiversity loss, and food security through integrated design.
  • True value goes beyond financial return: long-term resilience requires investing in systems that secure environmental stability, social wellbeing, and economic continuity.

Kotchakorn Voraakhom, sea levels are rising; cities are burning, sinking, or being flooded - and not just your hometown Bangkok. You draw your ideas on how to counteract climate change from nature. What lessons can it teach us?

Kotchakorn Voraakhom: Rising sea levels present a future far more complex than simple changes to the shoreline. We're facing saltwater intrusion, lost habitats, and destabilized ecosystems. To meet this, we must shift our perspective. Rather than fighting the water with rigid, single-minded solutions like seawalls and dams, we need to learn from nature itself.

Kotchakorn Voraakhom, Landscape Architect and Founder of Landprocess, Bangkok, Thailand

Kotchakorn Voraakhom

With her studio Landprocess and the nonprofit Porous City Network, Thai landscape architect Kotchakorn Voraakhom is on a global mission that extends far beyond her native Bangkok, combining the tools of architecture with the complex web of natural systems to improve climate resilience. Voraakhom has received the UN Global Climate Action Award, and been named one of the BBC100 Women and The Bloomberg Green 30.

Nature teaches us that resilience lies in dynamism, adaptability, and integration. A mangrove forest doesn't just block water: it dissipates wave energy, builds land by trapping sediment, nurtures vast food webs, and stores carbon. A wetland acts as a sponge, absorbing floodwaters while filtering impurities. A healthy sand dune system moves and evolves with storms.

The most important lesson is to work with these natural systems, not against them. We must move away from a mindset of pure "protection" to one of regenerative adaptation. The goal is not to shield our cities at the expense of nature, but to reintegrate them into the living landscape.

You launched your firm Landprocess in 2012, right after Thailand's devastating floods in 2011. What did the floods mean to you?

The 2011 floods were a pivotal moment, and a brutal lesson in the need to "adapt or die" - not just for me but for millions. In a country with a deep-rooted water culture, where seasonal flooding was once welcomed and even utilized, flooding was now a catastrophic force. This forced a fundamental question: Why have we become so vulnerable to the very element we once lived in harmony with?

Reconnecting the city with water: Chulalongkorn University Centenary Park shows how urban design can work with nature. © LANDPROCESS

We know that floods will come every year, and extreme events arrive every decade. Yet our cities are designed to hastily expel water, not coexist with it.

The disaster defined my purpose as a landscape architect. It moved me beyond simply asking how to fix things, towards understanding why we were in this crisis. Yes, we had to rebuild, but not based on fear of getting wet. My mission became clear: to rediscover how to design our cities to live intelligently and resiliently with water.

How much is your work inspired by your Thai background, as opposed to your education at Harvard?

Being Thai has been a huge gift. My Harvard education, and American experience as a whole, didn't overwrite that; instead, it acted like a mirror. It reflected back to me the essence of my Thai identity and how to apply its unique wisdom in an international context.

This has given me the confidence to be fearlessly who I am. In Asian culture, there is a deep appreciation for harmony, subtlety, and indirectness. These values permeate our way of thinking and designing. My Western education gave me the tools to combine these with the precision and power needed to meet global challenges. The two are not in conflict - but a perfect mix.

No standard form, but a shared philosophy: projects like the Thammasat Urban Rooftop Farm turn urban space into systems that manage water, produce food, and cool the city. © LANDPROCESS

Looking at some of your signature projects, like Chulalongkorn Centenary Park, Thammasat Urban Rooftop Farm, and the updated Thai Government Complex, what elements do they share as standard features?

These projects have a "standard philosophy" but never a standard form. Each design is born from its site's unique social and environmental needs, not merely its function as a park, a rooftop, or a beautified space. But they all ask: How can urban development become part of the climate solution?

Collectively, they demonstrate that we can help our cities manage flooding intelligently, transform wasted space into productive assets, and tackle interconnected crises like urban heat, food security, and renewable energy. And do this while creating vital public spaces and solving multiple problems at once.

Ultimately, each project is a statement of faith that Bangkok can be better, and that our cities can be engines of adaptation. The message is clear: if we do not redesign our cities to work with nature, we will not survive. We must adapt, or die.

What are the basics of nature-inspired architecture that work universally around the world?

Nature-inspired architecture, or nature-based solutions (NBS), works with the living systems already present to create integrated and resilient environments.

First, it means designing for multiple benefits. A single-purpose, engineered solution, like a concrete seawall, is replaced by a multi-functional, living system.

Second, it embraces dynamism and flow. Nature is in constant motion. True resilience comes not from static control, but from facilitating natural processes. This means designing spaces that accommodate the movement of water, sediment, and species, allowing these systems to adapt and evolve over time.

Finally, it's rooted in building with and for biodiversity. By regenerating the intricate web of life, we create environments that are more robust, adaptive, and inherently valuable. Our designs should actively repair ecological connections, ensuring benefits for both human communities and the natural systems that sustain us.

Not just a building, but a public blueprint, the Regenerative Government Complex - where infrastructure, ecology, and civic space come together as one system. © LANDPROCESS

Have governments and corporations become more receptive to your solutions?

In general, there's more acceptance once designs both solve problems and provide multiple co-benefits. But the deeper question is: How can people, and especially top-down leaders, realize that "business as usual" is no longer sustainable? My projects serve as a starting point. Real change begins not with accepting a new design, but with challenging the old mindset.

To what extent is interest in nature-based solutions driven by reactions to extreme climate events, rather than more long-term thinking?

Today, interest is predominantly a reaction to extreme events, with a scramble for solutions after disaster strikes. But nature operates on a different timeline. We cannot build a thriving future with short-term fixes for long-term challenges.

Nature-based solutions are not about replacing our existing cities and grey infrastructure used for water and transport; they are about transforming our relationship with them. The old paradigm of rigid, single-purpose engineering is insufficient for the dynamic, interconnected crises we face.

The question is not if we should use nature, but how we can retrofit our urban environments by placing living systems at the heart of city management. This means re-engineering our grey infrastructure to work with green and blue systems, to be porous, adaptive, and multifunctional. True resilience emerges from this symbiosis. Nature is no longer an afterthought, or a decorative add-on, but the central strategy for long-term survival and vitality.

How important is the question of return on investment when you pitch or develop projects?

ROI is always crucial, but with nature-based solutions, we must radically expand its definition. Traditional ROI measures direct financial costs against a single benefit: profit. But nature-based solutions offer returns that are multi-dimensional and interconnected. The true investment is in our long-term survival and collective well-being.

We must move away from asking "What is the cost of this project?" to "What is the cost of inaction?", and "What is the value of a regenerative, resilient future?" Nature-based solutions are the only form of development that pays dividends across financial, environmental, and social ledgers simultaneously. It's the ultimate value investment.

Companies are already struggling to mitigate the consequences of climate change by redesigning or stress-testing their supply chains and site locations. Is there something about working with public entities that you wish multinational corporations would adopt as well?

Absolutely. While corporations excel at strategic planning for their operations, they often take a defensive, site-specific posture towards climate risk, and only focus on protecting their own facilities and supply chains. I wish more would see investment in public, city-scale nature-based solutions as a direct extension of their own risk mitigation and long-term business strategy.

For example, a corporation that builds a factory in a flood-prone area might invest in a higher perimeter wall. A classic, isolated adaptation. A more visionary corporation would co-invest with the public sector to restore upstream wetlands, or a city-wide green corridor. This would protect their factory, stabilize the regional ecosystem, secure the community and workforce they depend on, and future-proof their local investment. It moves their strategy from defensive adaptation to proactive system-building.

Europe

Rotterdam builds water plazas that double as public squares, along with green roofs and floating structures to manage rising sea-levels and heavy rainfall.

Copenhagen implements cloudburst streets, permeable pavements, and blue-green corridors to channel and temporarily store extreme rainfall.

Berlin promotes decentralized rainwater retention, green roofs, and infiltration systems that reduce sewer overflow and recharge groundwater.

Asia

Wuhan, a flagship of China's national sponge city programme, uses permeable pavements, restored wetlands, green roofs, and retention parks to absorb and slowly release stormwater.

Singapore has an ABC (Active, Beautiful, Clean) Waters strategy that combines rain gardens, naturalised canals, and multifunctional reservoirs to manage runoff while enhancing public spaces.

North America

New York City uses large-scale nature-based systems like the Staten Island Bluebelt to absorb stormwater through wetlands instead of pipes alone.

Seattle installs "green streets" that capture and filter runoff directly within neighbourhoods.

Philadelphia advances its "Green City, Clean Waters" plan by investing in rain gardens, tree trenches, and porous pavements citywide.

South America

Medellín expands green corridors and river restoration to cool neighbourhoods and improve stormwater absorption.

Curitiba uses floodable parks along riverbanks as retention basins, preventing development in high-risk zones.

Buenos Aires combines urban wetland restoration and stormwater tunnels with new permeable public spaces.

Africa

Beira restores mangroves and coastal wetlands to buffer flooding and storm surges.

Cape Town expands aquifer recharge, stormwater capture, and green infrastructure in response to drought and flood risk.

Kigali protects and rehabilitates urban wetlands to manage runoff and reduce landslide and flood exposure.

Oceania

Melbourne integrates rain gardens, stormwater harvesting, and constructed wetlands into streetscapes.

Sydney embeds permeable paving and recycled stormwater systems in new developments to reduce runoff and meet potable water demand.

Auckland applies low-impact design standards requiring on-site retention, green roofs, and stream daylighting.

Taking the movement global

The Porous City Network, founded in 2016, works to empower the next generation of designers and local communities to co-create solutions "rooted in ecological intelligence and cultural wisdom" based on prototypes developed by Voraakhom's firm. The PCN currently operates in Thailand, Malaysia, Laos, and the USA, and has partnered with the Dutch government.

Many people are walking in both directions in an urban, tree-lined pedestrian area.
Sustainability

Urban living with climate change

The majority of the world's population lives in cities. As a result, urban centres must find innovative ways to respond to rising temperatures and water insecurity.
Sustainability

COP at 30: Still the world’s best hope for climate cooperation?

The UN's climate summits may be flawed, but without them, global cooperation on climate might never have taken root. Thirty years on, COP remains the world's only forum for confronting a shared climate future.
Sustainability

How Nancy Kemboi's farm defies climate change

The drought took away Kenyan farmer Nancy Kemboi's livestock and crops. But that was in the past. Today, she has enough feed reserves to last two years. She owes this to the FMNR reforestation method, the return of biodiversity to her land - and her innovative spirit.
A middle-aged man with dark hair stands at a lectern and speaks.
Sustainability

"A gigantic transformation process"

H.S.H. Prince Max von und zu Liechtenstein, Chairman LGT, discusses the pivotal role of education in addressing climate change and shares his vision for the evolution of impact investing in the decades ahead.
Sustainability

Seven myths about renewables

The shift from fossil fuels to clean energy has been decades in the making, but misinformation continues to cloud the debate. We unpack the most common misconceptions and show why the transition is both unstoppable and necessary.
Reto Knutti, standing on a terrace with Lake Zurich and the university in the background, looks into the camera.
Sustainability

Climate scientist Reto Knutti: Climate policy is domestic policy

Climate scientist Reto Knutti is one of the most in-demand climate experts. We talk to him about giving things up, emotions, net zero and investments.
Futuristic AI image of a sustainable hotel
Sustainability

Sustainable tourism: Leading and lagging in the fight against climate change

Travel and tourism companies can teach us a lot about the power of optimism and innovation, and the dangers of not following through on promises.
Three young people in casual clothes sit on a wooden footbridge with a view of wooded mountains.
Sustainability

Saving tourism from itself: solutions for a cleaner industry

As visitor numbers rise, the economic benefits of tourism could well be outweighed by the industry's negative environmental impacts. The challenge for policymakers and industry leaders is to present sustainable alternatives that attract the next generation of tourists while preserving the...