If you live west of D.C. and east of Omaha, there's a good chance you're pretty close to one of the 25 dirtiest coal plants in the U.S. Twenty of them are 50 to 100 miles away from major urban areas, according to Climate Progress.

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What does "dirtiest" mean? Well, these 25 plants represent 4 percent of the country's coal plants, and provide about 8 percent of the country's electricity generation, but account for 30 percent of mercury emissions from the U.S. electricity sector. 

Here's Climate Progress' list of the worst offenders in terms of overall mercury emissions:

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