Each time I pass by the closed airport in the middle of Berlin I am amazed by the crazy idea to have built this and maintained throughout the 20th century. Paris is desperately trying to re-naturalize small areas and roads, while in Berlin there is now still the huge park to enjoy for all. Sports activities benefit the most. What an amazing asset in the neighborhoods for so many in need to walk, run or cycle a bit to keep their exercise level up throughout their life course. It has still a huge potential to activate people. It just needs a bit more organizations and volunteers to embrace the opportunities. Only in comparison to other cities you realize what an asset this is now. It will remain a challenge to preserve this centrally located treasure for the benefit of all. In Paris the deconstruction of concrete is taking shape and 300 new sites have been identified for re-naturalization, as reported in LeMonde. In Zurich green spaces in the center have been saved and renovated with a lot of money to allow more people to enjoy the benefits of a green environment near the city center. The house and park by architect Le Corbusier is a fine example of this. Image below. The garden around the house is publicly accessible. As air pollution is threatening more and more and heating in cities is a serious health threat we would really like to welcome more preservation and re-naturalization in inner cities.