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Subsidiaries of Westlake Chemical Corporation have agreed to reduce harmful air pollution at three chemical plants in the United States
Westlake Chemical Corporation's five subsidiaries — Westlake Chemical OpCo LP, Westlake Petrochemicals LLC, Westlake Polymers LLC, Westlake Styrene LLC, and Westlake Vinyls, Inc. — have agreed to spend $110 million on upgrades and compliance measures to resolve allegations that th...