The best trees to reduce air pollution

Vittoria Traverso

2020-05-04

BBC

Keywords: Urban trees, Air pollution reduction, Tree species, PM filtration, Conifers

Trees can improve air quality in direct and indirect ways. Indirectly, they can help by shading surfaces and reducing temperatures. If buildings are shaded by trees, it reduces the need for conventional air conditioning, and the emissions of greenhouse gases that come with it. Plus, lower temperatures decrease risk of harmful pollutants like ground level ozone that commonly spike on hot days in urban areas.

The article highlights the vital role of urban trees in reducing air pollution in cities globally. Trees not only enhance urban habitats but also contribute to cleaner city air. While cities are increasingly incorporating greenery, the effectiveness of trees in filtering pollutants varies across different species. Certain trees, like conifers, are particularly adept at removing particulate matter (PM) due to their canopy structure and evergreen nature. Trees indirectly improve air quality by shading surfaces, reducing temperatures, and decreasing the need for air conditioning, thereby lowering greenhouse gas emissions. Additionally, trees act as natural purifiers by dispersing and trapping pollutants like PM, offering a sustainable means to combat air pollution and create healthier urban environments.

Tags: Urban trees, Air pollution reduction, Tree species, PM filtration, Conifers