press release
Published: 05 March 2024

Plant Lavender, Marjoram and Ivy on your green wall to clean up the air

Green walls can strip pollution from the air – and some plants do it better than others, according to new research from the University of Surrey.  

Researchers planted 10 species on a custom-built 1.4m green wall beside the A3 in Guildford.  

Plants remove air pollution in two steps. First, they catch particles of pollution on their leaves. Then, the rain washes them safely to the ground.  

Evergreen Candytuft and Ivy leaves were found to be especially good at trapping pollutant particles, large and small.  

The study is published in the journal Science of the Total Environment.  

It helps promote the UN Sustainable Development Goals (SDGs) 3 (good health and well-being), 13 (climate action) and 15 (life on land).