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Most hybrid and electric vehicles rely on rare earth metals. There'd be nothing wrong with that if China didn't supply in excess of 90 percent of the world's rare earth metals. Why is this a problem? Because China's recent decision to slash export quotas on rare earth metals has caused a surge in prices, for one thing.

Controlled Power Technology's Variable Torque Enhancement System (VTES) is currently being shown off in Stuttgart, Germany. According to Guy Morris, engineering director and chief technical officer, "From an idea first conceived in the year 2000, this technology has been progressively developed to the point where it is now a mature well-proven second-generation design, ready to be adopted by carmakers."

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