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“The developing plastic waste crisis has been building for decades,” the National Academy of Sciences study said, noting the world’s current predicament stems from years of technological advances. “The success of the 20th century miracle invention of plastics has also produced a global scale deluge of plastic waste seemingly everywhere we look.”

The United States contributes more to this deluge than any other nation, according to the analysis, generating about 287 pounds of plastics per person. Overall, the United States produced 42 million metric tons of plastic waste in 2016 — almost twice as much as China, and more than the entire European Union combined.

“The volume is astounding,” said Monterey Bay Aquarium’s chief conservation and science officer, Margaret Spring, who chaired the NAS committee, in an interview.

The researchers estimated that between 1.13 million to 2.24 million metric tons of the United States’ plastic waste leak into the environment each year. About 8 million metric tons of plastic end up in the ocean a year, and under the current trajectory that number could climb to 53 million by the end of the decade.

That amount of waste would be the equivalent to “roughly half of the total weight of fish caught from the ocean annually,” the report said.

Congress last year ordered the National Academy of Sciences study, which drew on expertise from American and Canadian institutions, when it passed Save Our Seas 2.0 in an effort to address plastic waste.

“This report is a sobering reminder of the scale of this problem,” the legislation’s co-author, Sen. Dan Sullivan (R-Alaska), said in a statement. “The research and findings compiled here by our best scientists will serve as a springboard to our future legislative efforts to tackle this entirely solvable environmental challenge and better protect our marine ecosystems, fisheries, and coastal economies.”

Sen. Sheldon Whitehouse (R.I.), the law’s primary Democratic sponsor, said, “I look forward to working with colleagues on both sides of the aisle to keep making progress cleaning up this harmful mess.”

Christy Leavitt, plastics campaign director for advocacy group Oceana, said in a statement that the findings show the extent of U.S. responsibility for a global problem.

“We can no longer ignore the United States’ role in the plastic pollution crisis, one of the biggest environmental threats facing our oceans and our planet today,” she said. “The finger-pointing stops now.”

Spring said that the National Oceanic and Atmospheric Administration and the Environmental Protection Agency would be best positioned to develop a national strategy to curb plastic waste.

“There’s more activity and testing of solutions at the state level as compared with other countries that are taking it at a national level,” she said. “Plastics and microplastics are ubiquitous in inland states too,” Spring said, referring to rivers, lakes and other waterways.

“A lot of U.S. focus to date has been on the cleaning it up part,” said Spring. “There needs to be more attention to the creation of plastic.”

The American Chemistry Council, a trade association, endorsed the idea of a national approach but said it opposed efforts to curtail the use of plastics in society.

“Plastic is a valuable resource that should be kept in our economy and out of our environment,” said the group’s vice president of plastics, Joshua Baca, in a statement. “Unfortunately, the report also suggests restricting plastic production to reduce marine debris. This is misguided and would lead to supply chain disruptions.”

The bipartisan oceans bill enacted last year also calls for a number of other analyses to be completed by the end of 2022, on topics ranging from the impacts of microfibers to derelict fishing gear.

“You can’t just focus on one thing,” Spring said. “This really all has to be done with the end in mind, which is what is going to happen to this stuff when you’re finished with it.”

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