Green roofs, such as the one at the arboretum, are generally composed of a series of layered materials, including waterproof and root-barrier membranes, filter fabric, a lightweight, well-drained ...

Microplastics are everywhere and unavoidable. They’re in the water we drink, the food we eat, and the air we breathe. But if you’re a city slicker looking to reduce the impact of airborne plastic ...

The grant was given because green roofs reduce runoff by about 50 percent to 90 percent because the vegetation absorbs rainwater. The plants also act as a filter that minimizes pollutants in the ...

And there are many: according to the EPA, green roofs insulate, filter pollution, reduce storm water run-off, and naturally cool the air, reducing what’s known as the “heat island effect. ...

Glue excess fabric to the roof box to keep soil from creeping under. On top of the fabric, add a 4-inch layer of planting medium -- 60% pumice, 10% sand and 30% soil rich in organic material.