Why good green urban ideas stay small and how to scale them
Kurzbeschreibung
The presentation examines why effective grassroots sustainability initiatives like Caritas Carla and parklets in Vienna struggle to scale, highlighting structural barriers in urban governance and planning.
Beschreibung
Cities across Europe are short on mechanisms that enable sustainable ideas to work. This session takes a close look at two practical examples of grassroots urban sustainability in Vienna, Austria. One in textile waste management explored through the work of Caritas Carla Vienna, and one in urban space transformation. Both spaces and services provide a necessary public good but are unable to scale up, which begs the question – why do good ideas stay small?
The first case is Carla, a Vienna-based initiative at the heart of the city’s textile circular economy. Carla collects, sorts, and redistributes discarded clothing, pushing back against fast fashion culture while providing affordable alternatives to the public.
The second case is the parklet, a humble but powerful micro-transformation of urban parking space into green, social, and pedestrian-friendly community spots. Both initiatives work, however struggle to survive.
What connects them is a shared structural problem: cities tend to tolerate bottom-up sustainability projects rather than actively integrating them into long-term planning. Funding is project-based and temporary, responsibilities are fragmented across institutions with no clear lead, and the organisations doing the heavy lifting are routinely left to absorb costs that serve broader public goals. The result is a familiar and frustrating cycle.

