A good breakdown ... author of the thesis on using a technique called pyrolisis to decompose tires, Maria Felisa Laresgoiti Perez
The world practically runs on pneumatic tires, but getting rid of them is an environmental nightmare. Apart from playground flooring material, running tracks for athletes and horses and unfashionable footwear, disposing of or reusing tires has proven to be extremely problematic (remember the Osborne artificial reef off Ft Lauderdale, Florida, made from old tires? It became an environmental disaster and had to be removed by the US Military). Now a scientist at the University of Basque Country, Spain, has used the process of pyrolisis to decompose and reuse the left-over components of pneumatic tires.