ByFusion uses the RePlast system to turn ocean waste into usable construction material. New-Zealand-based inventor Peter Lewis’ RePlast turns plastic waste into walls. The modular system is at the centre of ByFusion, a US-based company that converts 100 per cent plastic waste into an alternative building material. The problem of plastic waste is a mammoth one. According to statistics by the World Economic Forum, by the year 2050, there will be more plastic waste in our oceans than there are fish.…