A leading 'bioplastic' used in single-use cups and containers degrades in the ocean just as slowly as the oil-based stuff, and must be broken down in commercial facilities to be composted
. A leading alternative to traditional oil-based plastics is polylactic acid , a plant-derived material used in clothing, single-use cups and containers. PLA can be composted in industrial facilities, but researchers weren’t sure if the material would decompose naturally once in the ocean.at the University of California, San Diego, and her colleagues compared how several materials aged both at the ocean’s surface and suspended 10 metres below in a fine mesh cage.
The team also mirrored the experiment in the lab with seawater and bacteria to mimic the natural environment. Neither the PLA nor the oil-based fabrics put off any carbon dioxide gas, confirming the plant-based plastics weren’t chemically degrading either. In the sea and in the lab, “they didn’t degrade at all”, says Royer.Get a dose of climate optimism delivered straight to your inbox every month.
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