At a factory in Zhejiang province on China’s eastern coast, two mounds of discarded cotton clothing and bed linens, loosely separated into dark and light colors, pile up on a workroom floor. Jacket sleeves, collars and brand labels protrude from the stacks as workers feed the garments into shredding machines. It’s the first stage of a new life for the textiles, part of a recycling effort at the Wenzhou Tiancheng Textile Company, one of the largest cotton recycling plants in China. Textile waste is an urgent global problem, with only 12 per cent recycled worldwide, according to the Ellen MacArt…