Honda Motor Co on Tuesday said it has codeveloped the world’s first motor for hybrid cars that uses no heavy rare earth metals, a breakthrough that would reduce its dependence on the expensive materials, which are controlled mainly by China. Hybrid vehicles, which combine a gasoline engine and electric motor for better mileage, have gone mainstream in many developed countries but procuring a steady supply of rare earth elements such as dysprosium and terbium has been a challenge.
