Real world clean air zones ‘would be more effective’

Plans for clean air zones to be based on compliance with laboratory-based tests have been criticised as “grossly unfair and ineffective”

Some new cars emit far more nitrogen oxides than older ones. Photograph: Fabio Formaggio/123RFBuilding clean air policy around anything other than real-world emissions of nitrogen oxides (NOx) would be “grossly unfair and ineffective”, according to Emissions Analytics.

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