California and several environmental groups sued Exxon Mobil (XOM.N) on Monday and accused the oil giant of engaging in a decades-long campaign that helped fuel global plastic waste pollution.
The investigation mirrors California's previous probes into the oil industry's alleged efforts to mislead the public about climate change, which the state is also suing over.
Bonta, a Democrat, said his office specifically had sought information on Exxon's promotion of its "advanced recycling" technology, which uses a process called pyrolysis to turn hard-to-recycle plastic into fuel. He had said the technology's slow progress was a sign of Exxon's ongoing deception.
"Today's lawsuit shows the fullest picture to date of ExxonMobil's decades-long deception, and we are asking the court to hold ExxonMobil fully accountable for its role in actively creating and exacerbating the plastics pollution crisis through its campaign of deception," Bonta said in a statement.
He said he wants to end the company's "deceptive practices" and is seeking to secure an abatement fund and civil penalties for the harm inflicted by plastics pollution on California.
Exxon pushed back at the attorney general, arguing that solutions like advanced recycling work.
"Suing people makes headlines but doesn't solve the plastic waste problem. Advanced recycling is a real solution," said a spokesperson for ExxonMobil, adding that California has done "nothing to 'advance' recycling."
Exxon is the world's largest producer of resins used for single-use plastics, according to a report published last year by the Minderoo Foundation, with consultancies Wood Mackenzie and the Carbon Trust.
California's lawsuit comes ahead of a final round of global plastic treaty negotiations set to take place in Busan, South Korea, at the end of the year.
In those talks, countries are split over whether the treaty should call for caps on plastic production, a position opposed by Exxon and the global petrochemical industry.
The United States last month said it supports a treaty designed around global plastic production cuts.
Environmental groups praised the lawsuit. Christy Leavitt, Oceana's plastics campaign director, said California's lawsuit will "hold industry accountable and debunk the plastics recycling narrative that holds us back from real solutions."
