Madrid is constructing a green wall around the city as a means of reducing pollution and combating climate change. It plans to plant almost 500,000 new trees that will span 75 kilometers of an urban forest. The forest will consist mostly of plants and trees native to Spain, ensuring simplistic maintenance.
The urban forest is a component of Madrid’s comprehensive anti-pollution plan, which also calls for the building of zero-emission bus routes and the gradual prohibition of polluting automobiles. There will be play spaces, cycling lanes, and walking paths in the forest. To encourage biodiversity, there will also be green space on the bridges above the motorways.