Crumb Rubber
Crumb rubber is made from recycled tires! The recycling process removes cord and steel from the tires and leaves grainy, yet soft, ‘crumb rubber’. There are a wide variety of uses for crumb rubber including athletic surfaces, new tires, landscaping, playground surfaces, asphalt (rubber modified), trails and the list goes on.
According to Wikipedia, Rubberized asphalt is the largest market for crumb rubber! Followed by playground covering and running tracks.
Crumb rubber has aided in the prevention of major injuries from professional athletes.
Also according to Wikipedia, about 12 million tires are recycled each year for crumb rubber!