淨零公廁設計-600棵樹的第二生命

The Second Life of 600 Trees: A Sustainable Story of Net-Zero Public Restrooms Along the MRT Line

Introduction: The Dilemma of MRT Development

In the early morning, the gears of construction vehicles begin to turn, and the sound of chainsaws echoes through the construction site of the Taipei MRT extension. As towering trees fall one by one, 600 trees are forced to make way for the new tracks. For many citizens, the disappearance of this green canopy feels like an ecological disaster. However, this is not the end but the beginning of a new journey. With the collaboration of government departments and design teams, a bold idea takes shape: to let these felled trees continue to "live" in the city in a different form.

Regenerative Design: Giving Trees a Second Life

Faced with the inevitability of tree removal, we introduced the concept of regenerative design (Rewood Design). Every piece of wood, from trunks to planks, is carefully preserved, dried, and transformed into building materials. These 600 trees will be repurposed to construct 30 landscape net-zero public restrooms, embodying the spirit of the circular economy. "Circular to Scenic Toilets" is the slogan of this project, symbolizing the transformation of recycled resources into urban landmarks. The old trees that once provided shade are now reborn as pillars and beams of public restrooms, continuing to serve the community.

Circular Economy Transformed into Landscape Restrooms

Along the MRT line, every few stations now feature a unique restroom built from recycled wood. Approaching one of these restrooms, it resembles a small ecological pavilion: the warm wooden walls reveal the tree rings, telling the story of their past. Located in street-corner parks or near stations, these restrooms not only provide convenience but also become community landmarks. Passersby may find it hard to believe that these beautiful structures were once discarded construction materials. Through the ingenuity of the circular economy, waste has been transformed into aesthetically pleasing public facilities, proving the infinite possibilities of resource reuse.

Ecological Symbiosis and Green Innovation

These restrooms are not only environmentally friendly in their materials but also incorporate ecological symbiosis in their design. The open architecture, combined with light-guiding designs, allows natural light to flood the interiors during the day, creating a bright and warm atmosphere. Semi-transparent solar panels on the roofs capture sunlight during the day and provide lighting at night, while their translucency allows sunlight to filter through, minimizing the need for artificial lighting. A clever natural ventilation system uses convection principles to keep the air fresh without the need for electric fans. Some restrooms even feature green roofs with lush vegetation, creating micro-habitats for insects and birds, making the structures feel like living organisms rooted in the land.

Environmental Value and Social Impact

Through these 30 landscape net-zero restrooms, the 600 felled trees continue to serve the city. Each wooden component of the restrooms tells a story of recycling: compared to traditional building materials, using existing wood reduces carbon emissions and waste, creating truly net-zero public buildings. Citizens using these facilities experience the convenience and beauty of green innovation firsthand. Some may notice plaques on the walls detailing the history of the trees, realizing that the wooden floor beneath their feet comes from a tree that once stood near their home. These restrooms serve as on-site environmental education tools, subtly raising public awareness of sustainability.
 

Conclusion: A New Paradigm for Urban Prosperity

This sustainable story demonstrates the possibility of balancing urban development with environmental protection. Through innovative design thinking, Taipei County has turned infrastructure development into an opportunity for environmental prosperity: progress no longer comes at the expense of nature but coexists with it. The journey of 600 trees has resulted in 30 meaningful net-zero restrooms, bringing convenience to society and positive cycles to the environment. The environmental value and social impact of this project clearly highlight the government's commitment to building a sustainable city. The growth of a city is not just about concrete and steel but also about respecting life and pursuing innovation—even a fallen tree can take on a new form and continue to root itself in the city's future.

From Felled Trees to Rebirth: The Sustainable Journey of 600 MRT Construction Waste Trees to 30 Net-Zero Restrooms

During the construction of the Taipei MRT extension, 600 lush trees were forced to be removed. These trees, once guardians of the city streets, faced the fate of becoming waste or firewood. However, this was not the end of their story but the beginning of a new chapter. In an innovative sustainability project, these 600 trees were transformed into 30 landscape net-zero public restrooms, serving the city in a new form. Each restroom carries the warmth and story of the wood, becoming a microcosm of green innovation in the city and continuing the life journey of these trees.

Rewood Masters: The Pioneers of Circular Regenerative Design

Leading this "tree rebirth" project is the Rewood Masters team—partners of the SSBTi (Science-Based Targets initiative) and the main drivers of this proposal. They specialize in transforming discarded wood into valuable resources. The founders of Rewood Masters, inheriting their ancestors' spirit of "cherishing wood," are dedicated to forestry circular economy: discovering new value from pruned branches and fallen trees, creating wood products without cutting down new trees. They pioneered the application of high-temperature wood distillation technology in urban wood recycling, extracting natural wood vinegar during the charcoal-making process to produce eco-friendly cleaners. They also developed carbonized charcoal into green building materials for dehumidification and deodorization. With the assistance of the SSBTi, Rewood Masters has begun integrating sustainable partners, such as the SenSenWood team, to recycle plastics into usable materials, expanding their service and talent training network. Rewood Masters' recycled wood technology and locally sourced wood form a high-quality sustainable building material network, featuring zero formaldehyde, carbon sequestration, and carbon reduction, with excellent durability and weather resistance. The team, through learning traditional woodworking skills, trains young craftsmen in material selection, cutting, assembly, and painting, ensuring each restroom embodies the value of the circular economy.

Innovative Design: From Circular to Scenic Green Restrooms

These restrooms, built from recycled wood, are not only functional but also unique urban landmarks. The design team integrates circular concepts into aesthetic creativity, making each restroom resemble a small "secret garden." The exteriors blend naturally with the environment, incorporating existing greenery or tree canopy elements, allowing the structures to harmonize with the surrounding ecology. The facades, made from recycled plastic wood, feature wood grain textures that are visually warm and durable. Some restrooms even have rooftop observation decks or small green roofs, allowing visitors to enjoy views reminiscent of tree canopies. Through innovative regenerative design, the once-felled trees return to the city in a new form: during the day, they are public facilities filled with natural light and the scent of wood; at night, warm light filters through wooden grilles, creating a soft glow on the streets. These restrooms redefine the cold, utilitarian image of traditional public toilets, offering a sense of natural affinity and storytelling.

Green Technology Applications: Light Guidance and Ventilation for Net-Zero Energy Consumption

To achieve net-zero emissions and sustainable operation, each restroom incorporates multiple green innovations:

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• Natural Lighting: Advanced light tubes and skylights on the roofs bring sunlight into the interiors, illuminating the space even in narrow corridors or secluded stalls, reducing the need for electric lighting and creating a bright, comfortable environment.

• Natural Ventilation: The architectural design uses chimney effects and cross-ventilation principles for passive airflow. Tall ventilation towers and wall louvers allow hot air to rise and exit, while fresh air is drawn in from below, maintaining continuous air circulation. Some restrooms also feature adsorption panels made from recycled charcoal, using its porous nature to dehumidify, prevent mold, and purify the air, ensuring a fresh and odor-free interior.

• Renewable Energy: Hidden solar film panels on the roofs or canopies harness sunlight to generate electricity, powering nighttime lighting, sensors, and purification equipment. Paired with small energy storage modules, the restrooms achieve energy self-sufficiency, ensuring stable power even at night or on cloudy days, with near-zero grid reliance.

• Smart Energy Management: Energy-saving sensor systems, such as motion-activated lighting and ventilation based on air quality, minimize energy consumption through intelligent management.

• Water Recycling: Innovative PVA water purification technology and rainwater collection systems recycle handwashing water and rainwater for flushing and irrigation. Algae biofiltration walls not only purify water but also assist in carbon capture through photosynthesis. This system significantly reduces tap water consumption, achieving water recycling.

Through these technologies, the 30 restrooms minimize energy consumption and carbon emissions during construction and operation, truly realizing the goal of net-zero energy use. At the same time, these technologies provide a comfortable experience for users: natural light eliminates the oppressive darkness of traditional restrooms, and fresh air circulation prevents stuffiness. Technology remains invisible, leaving users with a sense of nature and convenience.

Government and Corporate Collaboration: Policy Alignment and Circular Economy Co-Creation

Such a large-scale sustainable transformation project requires close collaboration between government and businesses. From the proposal's inception, the Rewood Masters team actively engaged with local governments to ensure seamless alignment with policy goals. The New Taipei City Government (formerly Taipei County) strongly supported the project, recognizing the innovative approach of turning environmental losses from MRT development into environmental gains. Relevant departments coordinated to preserve the felled wood during the construction phase, entrusting it to Rewood Masters for recycling, demonstrating policy flexibility and commitment. Additionally, the government provided suitable land and regulatory adjustments, allowing these landscape restrooms to be strategically located in parks or transit hubs along the MRT line, enriching public spaces and ensuring accessibility.

On the corporate side, several ESG-focused companies joined the collaboration: green energy tech firms provided high-efficiency solar panels and energy storage equipment, local architectural firms contributed creative designs that integrated with the landscape, and environmental tech startups shared wastewater recycling solutions. Through public-private partnerships, the project formed a cross-sector sustainability alliance. Corporate participation not only demonstrated corporate social responsibility (CSR) but also provided a platform for innovation. Meanwhile, government departments leveraged private-sector innovation to accelerate the realization of circular economy and net-zero emission policy goals. This seamless collaboration ensured that every stage—from design and construction to operation—adhered to sustainable principles, aligning policy with practice.

From Circular to Symbiotic: Extending Life Through Urban Services

The implementation of the "Circular to Scenic Toilets" concept not only achieved environmental success but also brought multiple symbiotic benefits to the city. First, the reuse of 600 trees symbolizes the continuation of life in a new form. The trees felled during construction were transformed into public service facilities, continuing to serve the daily needs of citizens. As people walk into these restrooms, stepping on floors made from the roots of those trees and inhaling the faint scent of wood, they may realize that every brick and plank carries the gift of nature, fostering a deeper appreciation for the environment.

Second, ecological symbiosis flourishes around these restrooms. The construction team incorporated ecological considerations into the site selection and design, planting native trees and flowers to create small green habitats for birds, butterflies, and insects, mitigating the ecological impact of tree removal. Each restroom becomes a micro-ecological park, connecting with nearby forests to restore urban green networks. Additionally, explanatory signs at the restrooms share the story of wood recycling, turning them into outdoor environmental education classrooms. Schools can organize visits for students to learn about wood recycling, biochar deodorization, and rainwater reuse, while citizens absorb sustainability concepts through daily use.

Third, the project has significant social impact. Through Rewood Masters' workshop model, local employment opportunities were created, with young carpenters and technicians staying in their hometowns to serve their communities. Residents also developed a sense of pride and ownership—what was once an avoided public facility became a local highlight due to its design and environmental significance, enhancing the community's image. In the long term, these 30 landscape restrooms will serve as a model for urban sustainability, demonstrating how circular economy principles can be integrated into daily life and inspiring further innovation.

Conclusion: The Legacy of Sustainable Innovation

The story of transforming 600 felled trees into 30 landscape net-zero restrooms sends a powerful message: sustainable innovation can turn loss into assets. The Rewood Masters team, with their circular economy mindset and innovative design, has left the city with a legacy that balances environmental and humanistic values. For the government, this is more than an upgrade to public facilities—it is a tangible manifestation of policy goals, turning abstract concepts like carbon reduction, energy efficiency, waste reuse, and local revitalization into visible, touchable public infrastructure. The cumulative reduction in carbon emissions, energy savings, and water conservation from each restroom will serve as building blocks for the city's 2050 net-zero target. At the same time, residents directly benefit, and society gains a stronger sense of the government's commitment to sustainability.

These restrooms carry more than just their functional purpose—they embody a belief that we can coexist with nature, allowing economic development and environmental protection to progress hand in hand. The trees that once fell have returned to the city's embrace, continuing to serve through new purposes. Their rings record the past, while the beams and pillars of these structures support the future. This life-extending initiative will become a celebrated chapter in Taipei County's sustainable development, inspiring us to explore more possibilities. With the joint efforts of the government, businesses, and the public, the city will witness more green innovations, composing a moving story of resource circulation and endless renewal for future generations.