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I'm sure you've seen pictures huge piles of tires in garbage fills or heard about tire dump fires that burn for months. Have you ever wondered what happens to old tires? Until recently, not much. A relatively young company called Lehigh Technologies now has a process for recycling old tires. The process is quite simple. Lehigh takes scrap rubber, freezes the rubber with liquid nitrogen to make it brittle, and then cuts and crushes the tires into various sizes. Until Lehigh's recycling technology, rubber was not able to be ground fine enough for massive reuse. Now, Lehigh's pulverized rubber is being reused in a variety of products, such as wheel wells, carpet padding, plastics, bumpers, and paints just to name a few. The process sounds a bit energy intensive to me, but Lehigh claims it's fairly efficient and good for the environment. Lehigh's plant is able to process 100 million pounds of rubber per year. Assuming 25 pounds per tire, that's 4 million tires recycled per year. With the prices of oil-based synthetic rubber and natural rubber rising, demand for recycled rubber is increasing. Demand is so high that Lehigh is planning to build an additional processing plant this year. Hopefully Lehigh can save some landfill room and prevent toxic tire fires.