"Our research demonstrates that innovative porous landing surfaces can drastically reduce noise from drones and air taxis, paving the way for quieter and more sustainable urban skies," added Dr ...

One such challenge is the holes in porous surfaces can get clogged with dirt and debris, a challenge noted by John Westerling, Worcester’s commissioner of parks and recreation.

It looks like and feels like a regular street. But beneath the surface, six layers are working to keep rainwater from overwhelming New York City neighborhoods. By Dodai Stewart This is Street Wars ...