“Mexican druglords have found an earthy new source of wealth: dirty old coal. They are mining it themselves in a coal-rich area along the US border or buying it from small mine operators, then reselling it to a state-owned company at fabulous margins that can see them make a profit 30 times greater than their initial investment. Reforma newspaper says the Zetas produce or buy 10,000 tonnes of coal a week. Selling it at their inflated prices, that means yearly revenue of $22 million to $25 million.”
http://www.rawstory.com/rs/2012/11/17/mexicos-zetas-drug-cartel-strikes-gold-in-the-coal-business/
