Trees and woodlands make London a healthier, more attractive place to live, and help combat climate change and air pollution.
London's urban forest contains an estimated 8 million trees and covers around 20% of the city's land area. See how we measured tree canopy cover.
The Mayor has committed to a major tree-planting programme, working in partnership with businesses, the community and the public sector. Find out how you can take part in London's biggest ever tree planting weekend on 1 and 2 December 2018.