Why aren't these everywhere?

Rubbersidewalks are made of 100% recycled tire rubber. The waste rubber from one passenger tire creates one-square-foot of Rubbersidewalk, helping to recycle the more than 34 million passenger tires disposed in California alone. At the end of their lifecycle (at least 14 years), Rubbersidewalk pavers can be recollected and recycled back into the manufacturing process.

Inhabitat :: Rubbersidewalks