Last week the new monitoring site at Shepherds Bush Green become the third London monitoring site this year to measure more than 35 days with mean PM10 above 50 ug m-3, thereby exceeding the UK Air Quality Strategy objective. In addition to traffic, it is likely that nearby construction (partial demolition of a nearby building earlier in the year and on-going works on the Green itself) has been an important local source of PM10.

via Environmental Research Group (ERG) :: King’s College London :: Latest News.

To find out what PM stands for, read on: What does PM stand for?