A great material that is easily available through most local concrete suppliers, porous concrete is a wonderful option to control rain water run off. Good for trees and the watershed, for not much - if any - more money, this is a material that is becoming more popular for municipalities and projects where rain water run off is an issue.
Here is a video demonstration of this type of material at work - very cool.
Aesthetically attractive and appropriate for most low volume traffic and pedestrian uses, it is a great option to have in your design arsenal. Pervious asphalt and various pavers are also readily available.
Here's what the EPA has to say...
Just another example of a tweak to a common material can make it so much more friendly!
