EPA found only 27 of 219 plants needed upgrades; 71 later got exemptions as Donald Trump scrapped mercury limitsAlmost all coal-fired power plants in the US had the ability to comply with rules limiting their emission of dangerous pollutants such as mercury that can cause brain damage in children. Despite this, Donald Trump’s administration decided to demolish the standards anyway.Last week, the Trump administration said it is loosening restrictions on air toxins from mercury, lead and other hea...