More than 8.3 billion metric tonnes of plastic has been produced in the last six decades.
However, recycling plastic can be difficult as the most common process involves melting and reworking the material.
A new process developed by the University of California can turn polyethylene into useful smaller molecules.
If you thought those flimsy disposable plastic grocery bags represented most of our plastic waste problem, think again. The volume of plastic the world throws away every year could rebuild the Ming Dynasty’s Great Wall of China – about 3,700 miles long.