by Nick Perry Agence France-Presse NAIROBI, Kenya (AFP) – “Plastic still has value,” said Nzambi Matee of the mountains of discarded oil drums, laundry buckets, yoghurt tubs and other trash being shredded into colourful flakes at her Nairobi factory. “I believe that plastic is one of the misunderstood materials.” The 30-year-old Kenyan engineer and inventor would know: her start-up recycles tonnes of plastic destined for landfill into eco-friendly bricks that are stronger, cheaper and lighter […]