A coal-fired powerplant in Winfield, W.Va. The 2012 rule has been credited with preventing thousands of premature deaths.
Credit: John Raby/AP

WASHINGTON — The Trump administration on Thursday weakened regulations on the release of mercury and other toxic metals from oil and coal-fired power plants, another step toward rolling back health protections in the middle of a pandemic.

The new Environmental Protection Agency rule does not eliminate restrictions on the release of mercury, a heavy metal linked to brain damage. Instead, it creates a new method of calculating the costs and benefits of curbing mercury pollution that environmental lawyers said would fundamentally undermine the legal underpinnings of controls on mercury and many other pollutants.