(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 Had Candid Five-Hour Meeting With China’s He, US SaysAnt to Buy Back Shares at 70% Lower Valuation Than at IPOCEO Who Grew Up in Poverty Builds Rare $1.4 Billion Fish StartupMacron Is Trying to Get Back