A model poses on a make-shift catwalk during a fashion show organised by environmental group Greenpeace titled 'Toxic Threads - The Big Fashion Stitch-Up', in Beijing November 20, 2012. According to a recent Greenpeace study, major global fashion labels are using toxic chemicals in the production of their clothing, which occurs mainly in China, that leads to environmental degradation. REUTERS/David Gray (CHINA - Tags: ENVIRONMENT FASHION)