FILE - In this file photo taken Tuesday, June 9, 2015 South African artist Mbongeni Buthelezi works on a portrait in his Johannesburg Studio.  Buthelezi is turning discarded bits of plastic into sought-after works of art. The plastic bubbles pop under Buthelezi's fingertips, calloused from manipulating the hot, molten material he uses to create large abstract pieces and portraits. (AP Photo/Denis Farrell)
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