A project aims to plant three million trees – one for every man, woman and child – in Greater Manchester over the next 25 years.
Those behind City of Trees hopes the effort will not only green the region but improve our understanding of the benefits trees provide to society.
These include reducing stress, improve air quality and the amount of time shoppers spend in retail areas.
The project is also testing how trees can reduce flooding in built-up areas.
City of Trees director Tony Hothersall explained that the scheme had three main objectives.