Trees and the shade they provide are one of the best ways of cooling cities. But they also present challenges that are best resolved by managing this shared resource as part of an urban commons.
Greater urban density is making it harder to preserve, let alone increase, tree cover. It's vital, then, to demonstrate the full value of green infrastructure for healthy liveable cities.
A new study shows major Australian cities are suffering an overall loss of green space –
although some areas are doing better than others.
If planning decisions properly considered the value of trees in a city, we could have a modern transport system and tree-lined views to enhance the journey.
Cities are aiming to increase their tree cover. But there will need to be more than trees to encourage wildlife to return.
Invasive pests threaten the world's much-needed planted forests, as trees are declining.