The millions of automobiles on the road create numerous waste management problems, not the least of comes from the tires. Left in a dump, they can catch fire or break down and leach toxic compounds into soil and groundwater. However, there are several new uses for old tires. Tires are shredded and filtered of non-rubber components. Rubber Bark uses the shredded tires to create landscaping mulch [source:Rubber Bark]. Even more surprising, some companies chop tires into crumbs and create a sort of fake soil used on the artificial turf of football and soccer fields. One field can use between 20,000 and 40,000 scrap tires [source: American Recycler]. The rubber crumbs fill in between the artificial grass blades, providing stability to the surface and giving a softer, more natural feel.