Urban trees - our Vitamin G(reen) - Positive effects and benefits of urban trees - Selection criteria for urban trees - Which tree species are suitable for the city - The 40 most important urban tree species. Urban trees have long been important for health, well-being, experiencing nature, urban climate, and air quality. Their significance has recently increased due to climate change, the rising proportion of urban populations, the ongoing alienation from nature among city dwellers, and the growing appreciation of urban greenery. Urban greenery is now even referred to as Vitamin G. However, the demands on urban trees are also increasing: they are expected to fulfill their functions as comprehensively, for as long, and with as little effort and cost as possible. This book provides practitioners, planners, urban tree managers, and enthusiasts with the current state of knowledge.