In 2012, 280 million metric tons of plastic were produced worldwide. These scientists project that a total of 33 billion metric tons will have been produced by 2050.

Scientists calculated that the new classification would reduce the 33 billion metric tons of additional plastic produced by 2050 to 4 billion.

In the March online issue of Nature, a group of scientists argued plastic should be treated as hazardous waste.

They specifically urge the biggest producers