(Bloomberg) -- Once touted as a key driver of global oil profits, the plastics industry is staring down years of anemic margins as giant plants in China look set to send a deluge of production into the market. Most Read from BloombergWall Street Soothsayers Are Bewildered About What’s NextYellen Says US-China Ties on ‘Surer Footing’ After TripKremlin Says Turkey’s Return of Azov Defenders Violates AccordYellen Had Candid Five-Hour Meeting With China’s He, US SaysCEO Who Grew Up in Poverty Builds