Planting of mini-forests in cities is growing in popularity

Planting urban forests can boost biodiversity, help mitigate climate change, contribute to a cleaner air, and cool cities during heath waves. Above all, it looks like a lot of fun to plant and take care of these mini-forests with citizens or schools to green neighbourhoods.  A good idea for BiodiverCities? 

More on minitature urban forests here.  A nice video by WEF is on their twitter page.