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Everyday plastics emit greenhouse gases, scientists say

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Plastic used in everyday objects from bottles to packaging emit greenhouse gases when exposed to sunlight, according to a study released on Wednesday, as global concern about its impact on the world’s oceans grows.


Plastic pollution has come under increased scrutiny from environmentalists as the scale of the problem has become clear - this year it emerged that a giant island made up of plastic waste in the Pacific Ocean was far larger than thought.


Now scientists have discovered that commonly used plastics also generate the potent greenhouse gas methane as well as ethylene as they age, adding to the global tally of planet-warming emissions.


The study, published in the journal PLOS ONE, said plastics were “likely to be an insignificant component of the global (methane) budget” due to the low quantities produced in this way.


Nonetheless Jonathan Nichols, an associate professor of earth sciences at Columbia University in New York, said the finding was “definitely important”.


Methane emissions, mainly caused by burning fossil fuels, are a major driver of global warming, putting them in the crosshairs of the global fight against climate change.


Jennifer Provencher, a plastic pollution researcher at Acadia University, in Canada, said the results pointed to “another piece of evidence suggesting that losing plastic to the environment is not good”.


— Thomson Reuters Foundation


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