China’s oil refining giants have invested billions of U.S. dollars in recent years to boost production of chemicals used in components for the renewable energy industry. For example, China Petroleum & Chemical Corporation, or Sinopec, the top Chinese oil refiner, has invested in increased production of ethylene-vinyl acetate (EVA) and polyolefin elastomer (POE), Bloomberg reports. EVA and POE are increasingly used in solar cell manufacturing and with the Chinese boom in solar power capacity installations, refiners are eager to tap into…