People could soon be using their smartphones to combat a deadly form of air pollution, thanks to a new low-cost method of detecting nitrogen dioxide (NO2), a significant air pollutant, says a study. “The revolutionary method we have developed is a great start to creating a handheld, low-cost and personalised NO2 sensor that can even be incorporated into smartphones,” said project leader Kourosh Kalantar-zadeh, professor at RMIT University in Melbourne, Australia. Nitrogen dioxide increases the risk of respiratory disorders in children and can severely affect the elderly in particular.

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