By the early 1970s, scientists had learned that whales, turtles, and other marine life were getting tangled up in plastic debris, a problem that was killing 40,000 seals a year. They knew, too, that small plastic fragments were making their way into the ocean, and that plastic residues had entered people’s bloodstreams, presenting what an official from President Richard Nixon’s Council of Environmental Quality deemed a significant health threat, “potentially our next bad one.” The more people learned, the more plastic’s reputation transformed from all-purpose, indestructible wonder into something that maybe shouldn’t be trusted in your new microwave. Between 1988 and 1989, the percentage of Americans who believed plastic was damaging the environment rose from 56 to 72 percent. Larry Thomas, the president of the Society of Plastics Industry, warned in an internal memo that companies were starting to lose business, writing, “We are approaching a point of no return.”
Beverage companies and the oil industry hoped to advertise their way out of the PR problem, laying out plans to spend $50 million a year to tout the polymer’s virtues with slogans like “plastics make it possible.” They also turned to recycling. Lewis Freeman, the former vice president of government affairs at the Society of the Plastics Industry, an industry group, told Grist that he has a vivid memory of a colleague coming into his office, saying, “We’ve got to do something to help the recyclers.”
Freeman tasked the Plastic Bottle Institute — made up of oil giants like BP and Exxon, chemical companies, and can manufacturers — with figuring out how to clarify to recycling sorters what kind of plastic was what. In 1988, they came up with the plastic resin code, the numbering system from 1 to 7 that’s still in place.
Polyethylene terephthalate, or PET (1), is used to make soft drink bottles; high-density polyethylene (2) is used for milk jugs; polyvinyl chloride (3) is used for PVC pipes in plumbing, and so on all through 7, the catch-all category for acrylic, polycarbonate, fiberglass, and other plastics. The Plastic Bottle Institute surrounded these numbers with the chasing arrows logo, giving the public the impression that they could throw all kinds of plastics into recycling bins, whether there was infrastructure to process them or not. The Connecticut Department of Environmental Conservation warned that the confusion it would cause “will have a severe impact on the already marginal economic feasibility of recycling plastics as well as on recycling programs as a whole.”
Once the symbol was operational, Freeman said, “then everybody started putting it on everything.” Companies worked to make it official: Starting in 1989, the Plastic Bottle Institute lobbied for state laws mandating that the code numbers appear on plastic products. Their express purpose was to fend off anti-plastic legislation, according to documents uncovered by the Center for Climate Integrity. The laws eventually passed in 39 states.