Across Europe, many banks alongside motorways are planted with grass to stabilise soil and keep roadside landscapes tidy.

But there may be a better solution. Already some countries are experimenting with using moss in built-up areas to absorb air pollution. As countries search for nature-based solutions to climate and environmental challenges, roadside moss is starting to attract attention. So could mossy motorway banks work?

Moss could offer environmental benefits over grass, from trapping air pollution to slowing rainwater runoff during heavy storms.

Mosses are small plants that grow without roots or flowers. Instead of drawing nutrients from soil like most plants do, they absorb water and minerals directly from the air. They can grow in thin soils, shaded areas and exposed surfaces where grass often struggles. Once established, moss also requires very little maintenance. Unlike grass, moss grows slowly and stays low to the ground. This means roadside moss would require far less mowing, potentially reducing labour and maintenance costs along thousands of kilometres of roads.

Moss and air pollution

One of moss’s most fascinating features is its ability to absorb substances from the atmosphere. It can accumulate pollutants such as heavy........

© The Conversation