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The Sierra Club said the announcement will make New Hampshire the 16th state that is coal-free and New England the second coal-free region in the country.
New England's last coal-burning power plant set to close in win for environmentalists →
The groups said in a lawsuit that a 2015 EPA rule on coal ash failed to regulate a large portion of coal ash pollution in the United States.
EPA rule would force removal of toxic waste dumped near coal-fired power plants →
