Plants are often seen as the “lungs” of an ecosystem because they absorb carbon dioxide and emit oxygen. Trees have a remarkable range of traits that can help reduce urban air pollution, and cities around the world are looking to harness them.
While trees are generally effective at reducing air pollution, it isn’t as simple as the more trees you have in an urban space, the better the air will be. Some trees are markedly more effective at filtering pollutants from the air than others. To make the most difference in air quality in a street or city, it has to be the right tree for the job.