As of October 2011, there were at least 111 million scrap tires in stockpiles throughout the United States, with approximately 290 million more scrap tires generated each year. Markets exist for approximately 85% of scrap tires, such as tire derived fuel, civil engineering applications, and crumb rubber applications, and more states are adding specifications for use of crumb rubber in highway asphalt. Thanks to scrap tire management fees imposed by many states, scrap tire stockpiles in the United States have diminished significantly in recent years, to just one-tenth what they were in the early 1990's. Still, scrap tires create environmental threats and serious health hazards when they are improperly stored or catch fire. The negative environmental effects of scrap tires include becoming a habitat for disease-carrying pests; contamination of air, water, and soil; and impacts associated with wasting a valuable resource if disposed. Voluntary product stewardship efforts of companies like Bridgestone, which recently began recycling one tire for every Bridgestone tire sold in the U.S. through its One Team, One Planet program, aim to prevent these threats by ensuring that scrap tires are captured and sent to another valuable use.
What is PSI Doing on Tires?