Plastic wrap tangles around sorting equipment at recycling facilities, shutting down operations as employees try to cut it out of the equipment. Huge bales of paper shipped overseas can contain as much as 30 percent plastic waste. “Contamination is one of the biggest challenges facing the recycling industry,” the EPA said in a statement to Grist. It takes time and money to haul, sort through, and dispose of all this unwanted refuse, which makes recycling more of a burden for city budgets. Many cities have ended up cutting costs by working with private waste companies; some don’t even bother trying at all. About a quarter of Americans lack access to any recycling services.

The difficulty of recycling plastic can make the chasing-arrows symbol near meaningless, with environmental groups calling plastic recycling a “false solution.” Only around 5 percent of plastic waste in the United States gets shredded or melted down so that it can be used again. Much of the rest flows into landfills or gets incinerated, breaking down into tiny particles that can travel for thousands of miles and lodge themselves in your lungs.

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.

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.

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.