For the uninitiated, air purifiers work by pulling air through a series of filters—typically a HEPA filter, which captures 99.97% of particles as small as 0.3 microns (think: pollen, dust, and ...

A small device would detect movement from passing commuters using a passive infrared sensor. After receiving this information via WiFi, it would then release water vapour into the air.

Travellers on London's Tube network could end up with metallic particles from the polluted air in their bloodstream, a study has found. The tiny metal substances hanging around ticket halls ...

London's Tube network is polluted with metallic particles small enough to enter the human bloodstream, according to a study. University of Cambridge researchers conducted a new type of pollution ...