From Current's Weekly Planet:
"How much does a ton of coal cost? Go ahead take a guess."
"If you said this is a trick question then you're right. The price of coal is different all over the world. In China, the world's largest coal consumer, the cost of a ton of coal averaged to $97.28 in 2011. Over the past few months in the U.S., the price of coal has ranged from $8.15 to $60.90."
"The reason for the low cost of coal in the U.S. is low demand. The U.S. Energy Information Administration expects electricity produced by coal power plants to drop by 14 percent in 2012. Utilities are switching to cheaper natural gas and the Environmental Protection Agency has started to crack down on old, pollutingcoal plants."