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Study Supports Regulators' Effort To Limit Miners' Exposure To Coal Dust

By Mark Memmott
Published August 17, 2012 at 2:47 PM EDT
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Mark Memmott
Mark Memmott is NPR's supervising senior editor for Standards & Practices. In that role, he's a resource for NPR's journalists – helping them raise the right questions as they do their work and uphold the organization's standards.
See stories by Mark Memmott