3. Human Trafficking
Human trafficking ranks third on our list of biggest illegal industries and black markets in the world. It is a huge problem considering that there were 35.8 million slaves in the world in 2014. That means that one in every 200 people was a victim, according to Sabre. Sadly, people are usually unaware of how big this issue is. The third most profitable industry was worth about $32 billion last year which makes it one of the most profitable criminal activities.
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