Twenty million trees will be planted and 2,500 hectares (6,178 acres) of new woodland created in the west of England as part of a "national forest" drive, the government has announced.
The Western Forest will be made up of new and existing woodlands across Gloucestershire, Wiltshire, Somerset, the Cotswolds and the Mendips as well as in urban areas such as Bristol, Swindon and Gloucester.
It will be the first of three new national forests promised by the government to help meet a legally-binding target of achieving 16.5% woodland cover in England by 2050.
However, with only 10% cover achieved so far, environmental groups have warned much more needs to be done to meet tree-planting targets.