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Motorists were recently given some sweet news. The world's first "green" tires may be hitting the road within the next few years and they'll likely be made from sugar.

Strained supplies and high prices for natural and synthetic rubber have caused tire companies to look for more renewable and sustainable sources for raw materials. Traditionally, petroleum has been used to make almost 1 billion tires annually worldwide, with a single tire taking nearly 7 gallons of oil to manufacture.