During the summer of 2018, two of the largest cranes in the world towered over the Ohio River. The bright-red monoliths were brought in by the multi-national oil and gas company Shell to build an approximately 800-acre petrochemical complex in Potter Township, Pennsylvania—a community of about 500 people. In the months that followed, the construction project would require remediating a brownfield, rerouting a highway, and constructing an office building, a laboratory, a fracked-gas power plant, and a rail system for more than 3,000 freight cars. The purpose of Shell’s massive complex wasn’t simply to refine gas. It was to make plastic. Five years after construction began at the site, Shell’s…