How moss could help roads cope with heavy rain and reduce air pollution

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

Nearly half of Americans live in an area with a failing grade for air pollution, and the problem is only getting worse

Almost half of everyone who lives in the United States breathes unhealthy levels of air pollution, according to the American Lung Association’s annual State of the Air report, released Wednesday.