<strong>The long read</strong>: Amid the complex web of international trade, proving the authenticity of a product can be near-impossible. But one company is taking the search to the atomic level
Food fraud and counterfeit cotton: the detectives untangling the global supply chain theguardian.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from theguardian.com Daily Mail and Mail on Sunday newspapers.