More oceans swamped by plastic 'soup'
Australian scientists say it will take at least 500 years to stop the growth of five swirling masses of plastic waste in the world's oceans.
Even that grim scenario would depend on an immediate ban on more plastic going into oceans, they say.
A swirling mass of plastic debris was first discovered in the so-called north Pacific gyre about 15 years ago.
Since then more areas of plastic have been discovered in other oceans.
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