Pointless gadgets?

More community groups are starting to monitor air quality as cheap portable monitors become more available. But this is not necessarily a good thing, say experts. Gareth Simkins investigates

Air pollution in London and elsewhere is driving people concerned about the effects on their health to engage in community projects or buy cheap monitors. Photograph: David Holt/FlickrThe air around the ENDS office is unlawfully polluted with nitrogen dioxide (NO2). How do we know this? In February, our staff volunteered to help assess air quality around our base in Twickenham, south-west London, just down the road from the famed rugby stadium.

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