China is increasing production of ethylene, a petroleum derivative, in its oil-and-gas-rich west, with new facilities designed to meet carbon emission reduction targets, as conflict in the Middle East sparks concerns over supply chain vulnerabilities.PetroChina subsidiary Dushanzi Petrochemical brought an ethylene production line online in the Xinjiang Uygur autonomous region on Thursday, expanding its annual production capacity by 1.2 million tonnes, PetroChina said in a statement. It said the...