Stock Photo - 23 November 2023, Thuringia, Erfurt: Jonas Reif (l-r), Professor at Erfurt University of Applied Sciences, plants a young poplar tree together with Sascha Döll, Head of the Garden and Cemetery Office of the City of Erfurt, at the press conference on the research project of Erfurt University of Applied Sciences, which is investigating the question of which tree species will be able to survive in the urban climate in the future. Also present is gardener Marko Klärig. A total of around 30 trees are to be planted as part of the project, including unusual varieties such as eucalyptus. Photo: Jacob Schröter/dpa. - Erfurt/Thuringia/Germany