Living Planet: Illegal trade in wildlife

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The illegal wildlife trade is one of the world's biggest contraband markets. According to the World Wildlife Fund, animal trafficking rakes in as much €17 billion a year. Yet the illegal trade in animals for pets goes mostly unnoticed. The population of the Barbary macaque has declined by 50 percent over the past two decades, and Nik Martin went to find out more about a recent ban on their trade.