Tennis reinvention: Tennis balls, often thrown away after just a few games, are getting a second life thanks to Belgian eco-designer Mathilde Wittock. She turns discarded balls into creative furniture and sound panels, cutting and colouring each one to create functional and sustainable designs. The balls aren't glued, allowing them to be reused or recycled later, adding to their versatility and extended lifespan. Inspired by sensory research and the idea of reducing waste, Wittock's work shows how everyday items can be transformed into something new, impactful, and meaningful. Wittock's designs remind us that with creativity, even waste can bounce back into a better life.
Divided glow: Berlin's past as a divided city still glimmers in the night sky. Viewed from space, the city's eastern streets glow a warm orange, while the west shines in brighter, whiter light. This difference stems from the types of streetlights used. There are older, sodium-vapour lamps in the east and more modern fluorescent lighting in the west. The contrast reflects Cold War-era infrastructure, as each side developed separately under differing influences and priorities. Although Berlin has been reunified for decades, this striking light pattern is a reminder of its divided history. As the city transitions to more energy-efficient lighting, this glowing legacy may soon fade.
Eco subway: Barcelona's subway system is transforming energy efficiency. Every time a train slows down, the energy its brakes generate is converted to electricity that, in turn, supplies one-third of the subway's energy needs. This renewable energy powers trains, stations, station lights, and EV chargers. The energy even powers the ultra-fast charging points near metro stops. To maximize energy recovery and cut carbon emissions, the MetroCHARGE initiative is installing additional inverters. By using what otherwise would be wasted energy, Barcelona's modern subway showcases how public transit can lead to sustainable urban innovation even in the tunnels and on the tracks of a system that is over 100 years old.
Playful repairs: Jan Vormann's creative project, Dispatchwork, uses LEGO bricks to patch damaged walls around the world, blending playfulness with public art and everyday life. Beginning in Bocchignano, Italy, the idea has spread to cities across Europe, Asia, the Americas, and beyond. Local participants contribute bricks, which are carefully fitted into walls without glue, creating vibrant patches that blend childhood nostalgia with urban repair. Some installations use just a few pieces, while others incorporate large quantities, all inviting communities to collaborate and contribute their creativity. When creativity meets collaboration, even a broken wall can tell a brighter story.