A few years ago, scientists at Washington State University and the University of Washington discovered just how dangerous tire chemicals can be when they break down and make it into storm water runoff.

Now, there's a new round of research that offers some hope for tackling this problem with what's called "Permeable Pavement."

WSU Permeable Pavement Resources

King County: Natural Drainage Solutions

EPA: Soak up the Rain/Permeable Pavement