“The impact of these projects goes beyond just adding greenery,” Grasveld says. “It’s about showing what’s possible. If we can make this work on a rooftop with limited capacity, imagine what we could achieve with the untapped potential of urban spaces everywhere.” “And the resistance?” I ask, recalling the initial doubts. “Of course, there were and are skeptics,” he replies with a wry smile. “But we proved it works, one project at a time. And now, it’s happening.” As I step down the ladder, leaving this urban jungle behind, I think to myself: If they can build it here, why not everywhere? LT
attracts. The project has also become a hub for research, with Wageningen University studying its effects on biodiversity. Researchers regularly analyze soil samples, insect populations and plant health, turning the rooftop into a living lab. Grasveld’s ambitions don’t end here. He envisions connecting rooftops across the city to create green corridors. “We’re already seeing interest from other cities,” he says. “The goal is to turn rooftops into part of an ecological network that supports biodiversity, much like parks do — just elevated.” This approach to urban rewilding has sparked projects across Amsterdam and beyond. The Urban Jungle Project has completed over 25 landscapes from playgrounds, community gardens and corporate spaces, demonstrating their versatility in enhancing urban life. Each project begins with a thorough analysis of the roof’s load capacity, followed by quick installation. The pre-assembled modular crates allow for fast setup, minimizing disruption. Because the crates can be moved, roof issues can be addressed without removing the greenery — if a leak occurs, the crates are moved aside for repairs and then put back.
a homeowners association meeting.” The project’s funding offers key insights into urban green initiatives. Half of the cost was subsidized by the City of Amsterdam, with the rest covered by the homeowners association. Why would the city invest so heavily in a private rooftop? “It’s simple,” Grasveld explains. “Amsterdam is running out of space at ground level to meet goals for rainwater management, biodiversity and urban cooling. Rooftops are an untapped resource.” By retaining rainwater, supporting pollinators and mitigating the urban heat island effect, projects like this align perfectly with municipal sustainability goals. This model offers valuable lessons for other cities. Grasveld believes that partnerships between local governments and private entities are crucial for scaling urban green infrastructure. “The key is showing mutual benefit,” he says. “Cities meet their sustainability goals, while residents enjoy cooler homes, better air quality and increased property value.” The Urban Jungle Project’s impact extends past environmental benefits. Residents report cooler apartments during summer heatwaves. Neighbours and passersby enjoy the sight of greenery and the buzzing life it
DR. NADINA GALLE
highlights cutting-edge Internet of Nature (IoN) technologies and the practitioners transforming soil health, urban forest management, the creation of more livable
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