Nature Based Solutions - Implementation Models Database

Vertical green walls and facades

City Tree – Modules to absorb urban pollution

A short description of the NSB

A Berlin-based company has launched an urban air filter which it calls a “CityTree”. The unit includes a screen of moss and other plants that its maker says offers the same environmental benefits as 275 trees. In an innovative way, the CityTree combines the natural abilities of mosses with intelligent IoT technology. The cost-effective, low-maintenance and flexibly implementable biofilter improves the quality of life in cities considerably.

NBS Implementation context
Location Europe, Berlin
Status (from - to) On going Project (since 2015)
NBS Scale Object
NBS Impacts scale • Object • Neighbourhood • City
Urban density/ Soil consumption High (dense city center
NBS Typology

NBS Uban Challenges
Climate Issues Climate mitigation
Climate adaptation
Other 0
Urban water management and quality Urban water management and quality
Flood management
Other 0
Air Quality Air quality at district/city scale
Air quality locally
Other 0
Urban Space and Biodiversity Biodiversity
Urban space design
Urban space management
Other 0
Urban Regeneration and Soil Air quality at district/city scale
Other 0
Resource efficiency Food, energy and water
Raw materials
Other 0
Public health and well-being Acustic
Quality of life
Other 0
Environmental justice and social cohesion Environmental Justice: Recognition
Environmental Justice: Procedural Justice
Environmental Justice: Distributional Justice
Environmental Justice: Capabilities
Environmental Justice: Responsibility
Social Cohesion
Other 0
Urban planning and governance Urban planning and form
Governance in planning
Other 0
People Security Control of crimes
Control of extraordinary events
Other 0
Green economy Circular economy
Bioeconomy activities
Direct economic value of NBS
Other 0
NBS Stakeholders & Governance


Initial actors (Leaders) Market • Social enterprises / social entrepreneurs
Involved actors Governments • Local government/municipality • Semi-government organizations / institutions, Community • Research institutions, Market -
Ecological scale Local scale green area City scale green networks
Governance model CLUSTER 2: New Public Management • Business-led self-governance
NBS Financial aspects


Global (estimated) cost of the project -
Financing mechanism CLUSTER 3: Citizen inclusion • Cooperatives
NBS Business Models Archetype
Technological -
Social Substitute with renewable and natural processes
Organisational -
NBS Success and limiting factors
Process enablers
Knowledge Re-purpose the business for society/environment
Governance -
Economy Generation of evidence • Research on cost effectiveness, Collaboration • Networks
Process inibitors
Knowledge Process efficiencies • Action thinking approach, Co-creation and participation • Cross sectorial spaces and partnerships
Governance De-risking • Sharing risks, Create conditions for new business models and finance schemes, Cooperative competition, Real estate
Economy Uncertainty • Operational unknown • Performance unknown
IM Keywords