Looking at the report I don't really understand where your scepticism comes from there really does appear to have been a 36% reduction in NO2 readings over the

Looking at the report I don't really understand where your scepticism comes from there really does appear to have been a 36% reduction in NO2 readings over the period under consideration, an acceleration of an existing trend which the authors take into account in their modelling. They acknowledge the need for further monitoring to confirm that it's not an anomaly but given the existing readings it seems like the press release is making a reasonable representation of the science given the constraints of the format.