H&I
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BBC News article
What are TfL doing to reduce the level of pollution in stations? Would installing air purifiers help? Should FFP3 masks be offered as PPE to staff?The Northern line has the highest concentrations of dust levels of any Tube line.
The finding was revealed in a report commissioned by Transport for London (TfL) to analyse air quality on the London Underground.
The line had the highest levels of respirable dust on average, which means it can penetrate down to the deep lung.
TfL said dust levels on the Tube have been going down.