The Environmental Protection Agency is testing out a new technique for keeping heavily-used river banks from eroding into the water.
The EPA wants to see if these living retainer walls can contain lead pollution at a Superfund site in north Idaho.
To make these “soil burritos,” a construction crew pours a layer of dirt into what looks like a car-sized piece of burlap. Then they put down willow branches. If all goes according to plan, those willows will start taking root in the dirt next spring.