Our cities were built at a time when climate change was not yet an issue. Today, we are increasingly facing rising temperatures, which can be particularly challenging for the elderly and children.

Wouldn't it be wonderful if we could plant trees everywhere to transform our cities into green oases? Lush green avenues with abundant canopies? However, in practice, this is easier said than done. In urban areas, trees often have too little space to grow. Beneath the streets, there are sewers and utilities, and in areas with underground garages and subways, there is often only room for small trees. Trees need about 20 to 30 years to reach their full climate potential. Without sufficient space for roots, they become stunted in their growth or die prematurely, unable to realize their full climate potential.

Other cities have found creative solutions. In Spain, for example, shade sails are stretched between buildings. We can draw inspiration from these approaches! Wouldn't it be wonderful to span busy streets with a green canopy, perhaps through greening stainless steel nets? Climbing plants grow up to five times faster than trees. In how many streets could we create a cool and pleasant microclimate in such a simple way, encouraging residents to come outside even on hot days? A green network could stretch through the city, offering pleasant spaces for both people and animals.

Unfortunately, the path to this vision is fraught with obstacles. Critics ask, "What will it cost?" and some homeowners refuse to allow such nets to be attached to their buildings. Additionally, we must consider numerous requirements, from maintenance and care to street lighting and the fire department. Even for authorities, such structures in public spaces are largely uncharted territory.
"At this point, we could resign and give up all efforts – but we won't do that!" City administrations are aware of their new responsibility and are actively seeking solutions and allies, whether it be committed citizens, businesses, or of course, architects. With thoughtful planning and care, we can find solutions to turn a hot and hectic shopping street into a place to linger. Greening has a calming effect in general and can contribute to social relaxation in urban problem areas.
Urgent action is needed! The building authorities are already doing great work to green the city. To fill gaps between possible tree plantings, a "flying garden" can serve an important role.
Thus, the "flying garden" becomes another tool in the repertoire for combating urban heat islands.

In cooperation with Green4Cities GmbH and Thomas Ferwagner MSIng officium.