Gieß den Kiez app shows trees in critical need of watering and can be adopted by other heat-stressed cities around the world Amanda Gläser-Bligh sometimes attracts puzzled looks when she goes to water the eight-year-old street tree she has adopted outside her door in Charlottenburg, Berlin. “I n...
Source: [Guardian International](https://www.theguardian.com/environment/2026/oct/02/open-source-tree-map-berlin-water-urban-forest)