World's 8 biggest illegal businesses

Let's take a look at eight illegal activities that generate most revenue in the world.

Drug trafficking
Global revenue in 2012: $320 billion
Overall rank in revenue: 1

Counterfeit and pirated goods
Global revenue in 2012: $250 billion
Overall rank in revenue: 2

Human trafficking
Global revenue in 2012: $32 billion
Overall rank in revenue: 3

Wildlife trafficking
Global revenue in 2012: $19 billion
Overall rank in revenue: 4

Oil trade
Global revenue in 2012: $11 billion
Overall rank in revenue: 5

Fishing
Global revenue in 2012: $10 billion
Overall rank in revenue: 6

Logging
Global revenue in 2012: $10 billion
Overall rank in revenue: 7

Human organs
Global revenue in 2012: $600 million
Overall rank in revenue: 8