By planning our cities with nature – through nature-based solutions, green infrastructure and green open spaces – we can dramatically improve the quality of life for all. We need to halt and reverse the trends of biodiversity loss and take the path of Living in Harmony with Nature. On this World Environment Day, I call upon cities all over the world to become Cities with Nature and to share their good practices, as Montréal is doing, to create a dynamic community of practice! Let’s take strong action to create vibrant cities and ensure a healthy planet, where people and biodiversity can thrive.