Danes debate value of diesel particle filters

Jury still out over benefits of retrofitting buses, heavy lorries, with particulate traps

Researchers working for the Danish government have cast doubt over whether retrofitting existing buses and lorries with particle filters would result in significant air quality improvements or lower premature deaths.

The research was commissioned by an inter-ministerial panel set up last autumn to advise the government whether it should promote widespread retrofitting. The group published its first report last month, which is now open for public consultation.

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