In response to public concern, small, relatively inexpensive air pollution sensors are coming on to the market. But tests show that they can be inaccurate. Is there an alternative?

If only we could see the air pollution around us we could identify the culprits and avoid exposure. From an early age we are taught not to drink dirty water or eat mouldy food but we have less opportunity to avoid harmful air.

In a re-run of autumn 2010, this September’s warm weather caused unusually late summertime smog. Air pollution over most of England reached six on the UK government’s ten point scale. These incidents go largely un-noticed but they have a health impact; 10 days of high particle pollution in spring 2014 caused an estimated 600 extra deaths.

Continue reading…
Source: Guardian Environment