Automakers and suppliers are hunting for greener versions of basic materials that go into their vehicles and parts. Many basic materials have remained the same for decades, but a new determination to improve its environmental impact is spurring the industry to make changes in the way future vehicles are built. In November, Forvia, the world’s seventh-largest parts maker, launched Materi’act — a brand dedicated to developing and manufacturing sustainable materials such as bio-based foils, low-CO2 carbon fibers and “green steel” that emits less carbon in production. Continental, meanwhile, has launched several green surface materials in recent years, including Xpreshn. The supplier says Xpreshn can line car doors and instrument panels and be made with green or recycled materials. Steelmakers are also moving toward the production of green steel.