Coal mining companies and power plants that burn coal are trying to sort out the implications of a deregulatory move by the Trump administration late Friday. The EPA is proposing to re-think rules cutting the air pollutant mercury – it’s a toxin which can impact the brain development of babies. For now, the agency says it just wants to revisit its findings, but critics suspect a longer strategy to undercut this regulation and raise the bar in general for future environmental rules.

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