Integrated approach needed to tackle urban air quality

Both sticks and carrots are needed to reduce NO2 pollution in towns, says a study commissioned by DEFRA

The report backs low-emission taxis, such as this hybrid-engined vehicle in New York. Photograph: Karel Miragaya/123RFReducing concentrations of nitrogen oxides in urban areas requires both stick and carrot measures, “sustained over a long period of time”, according to a study for DEFRA.

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