Smartphones could be used to detect pollution after sensor breakthrough

A new method to identify unhealthy levels of nitrogen dioxide could let those at risk take control of their health with cheap, personalised sensors, according to new research by Australian and Chinese scientists. Nitrogen dioxide contributes to the dangerous smog that lurks over many of the world's cities, causing serious respiratory problems, among other health issues See also: Hot dogs, bacon and other processed meat linked to cancer risk, World Health Organization says Australian scientist Ko...