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There's more that one way to green a car, and many of the most interesting technological advancements don't involve powering an internal combustion engine. Consider that much of the fabric, plastic and rubber that goes into a car's construction is derived from petroleum, and you see why alternatives are becoming increasingly attractive. Automakers have taken up corn-based plastics and soy-based seat foam, and now the latest greenery comes by way of defatted soy flour. The latter is an organic su

Continental Tire's head of development, Burkhard Wies, has issued a warning to us all against so-called "eco tires." Europe is considering labeling tires with eco ratings if they have certain attributes like especially low rolling resistance or create minimal noise pollution. But Wies says that tires purposely designed for "extremely low rolling resistance and high mileage are 10-percent worse at wet braking than those with good all-round properties." In one example, the eco friendly tires incre