Senators said repeal was ‘particularly troubling’ and was counter to EPA’s mandate to protect human health

More than three dozen Democratic senators have begun an independent inquiry into the US Environmental Protection Agency (EPA) following a huge change in how the agency measures the health benefits of reducing air pollution that is widely seen as a major setback to US efforts to combat the climate crisis.

In a regulatory impact analysis, the EPA said it would stop assigning a monetary value to the health benefits associated with regulations on fine particulate matter and ozone. The agency argued that the estimates contain too much uncertainty.