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Dirtiest U.S. Coal Becoming Most Popular on EPA Rules

The dirtiest coal in the U.S. is becoming the most popular, thanks to tightening emission standards forcing power plants to reduce pollutants.

Demand for the fuel from the Illinois Basin in President Barack Obama’s home state climbed last year to the highest level since 1990 as sales of nearby Appalachian coal dipped and consumption of the product from Powder River Basin mines in Wyoming grew at a slower pace.