Do plants improve the climate in cities? How can greenery in architecture help reduce urban heat build-up and pollution by fine particulate matter, lower noise levels in the city, and enhance people's wellbeing? The manual on building greenery is aimed at citizens, architects and developers alike. It provides answers to the frequently asked questions - from greening existing buildings to greenery with new builds, from savings thanks to building greenery to grants and subsidies, from practical tips on choosing the right plants to the ecological impact on the urban climate. It's high time - and many examples in Germany and around the world show that greened buildings are already a fast-growing reality.