Shockingly, 15 million people in the developing world today survive by salvaging waste. Many of them are children. We lift the lid on the worldwide scandal of young kids forced to scavenge on rubbish dumps to survive.Meet Margaret, from Kenya. Margaret lives with her family on the Mwakirunge dumpsite just outside Mombasa. Every day she wades through rubbish, broken glass and toxic waste, collecting scrap metal and plastic to sell to earn a living. She is 10 years old.