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Tires themselves are a bit of an environmental eyesore, even though science is continually searching for alternatives to the rubber tree production process. While they can be recycled and reused, there is question as to the carcinogenic nature of some of the products they can be reused as, such as playground and garden mulch.
With so many question as to the safety of reusing tires, I'd say one of the greenest things you can do beyond maintaining, reusing, and recycling, is to get the most out of each tire before replacing it. This means not only taking proper care of them, but leaving them on a vehicle as long as it can be safe to do so. Here are a few quick guidelines for knowing when you should replace your tires and how you can help extend their useful life.
