The promise of an American manufacturing revival may depend on the availability of cheap feedstock for making plastics, writes Kevin Bullis. "The impact of cheap natural gas on manufacturing could extend beyond the production of various chemicals. Using natural gas as an energy source, rather than a chemical feedstock, could significantly lower costs for manufacturers who use a lot of energy," Bullis writes. "Overall, cheaper chemicals, cheaper steel, and cheaper transportation could make the U.S. a far more attractive place for a wide range of industries," he adds.

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