Towers and tanks rise from the banks of the Ohio River 25 miles northwest of Pittsburgh, where Shell Polymers plans to produce 1.6 million metric tons of plastic pellets annually.

To the Trump administration, the petrochemical industry and regional economic development officials, this state-of-the-art petrochemical plant offers a glimpse of the new economy for a part of Appalachia devastated when the steel industry collapsed a generation ago.

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