Trump administration declines to stiffen US clean air standards

The EPA chief, Andrew Wheeler, said the agency’s science review ‘identified a number of uncertainties’ and based on those believes that ‘the current standard remains protective and does not need to be changed’. Photograph: Étienne Laurent/EPA

source https://www.theguardian.com/environment/2020/apr/14/trump-epa-soot-pollution-clean-air-standards