In this case, the pavement in question has been designed to suck up the nasty pollutants from vehicles and fertilizers from rainwater runoff. Here's what EPA Acting Regional Administrator George Pavlou has to say on the subject:
There are literally millions of parking lots all over the United States and the rest of the world, and many of those are concentrated in densely-populated urban areas. What can we do about all that potential water pollution? That's exactly what the EPA is working to figure out. Over the next ten years, the EPA will be testing various porous pavement materials in its parking lots along with plants that are good at filtering and absorbing parking lot pollutants.Runoff from parking lots and driveways is a significant source of water pollution in the United States and puts undo stress on our water infrastructure, especially in densely-populated urban areas.
[Source: Wired | Photo: China Photos/Getty Images]