If you have ever participated in a trash cleanup along a shoreline, creek or road, you’ll undoubtedly have come across pieces of expanded polystyrene foam (EPS), popularly known by one of its brand names, Styrofoam.

Trails through natural areas have undeniable benefits, including improving our mental well-being, providing access for outdoor education programs, and reducing air pollution and greenhouse gas emissions if people use them instead of driving cars.