Do you want to track how much ozone, black carbon and other pollutants you are exposed to when out cycling or walking? This is possible with an app – AirProbe – combined with a small sensor box. Partners from Belgium, Germany, Italy and the UK have developed this system to increase people’s awareness of their environment. More than 300 people in Antwerp, Kassel, Turin and London participated in the first tests. A similar app related to noise pollution – WideNoise – has already been used by more than 10,000 people and was at the centre of a study around Heathrow airport. Data collected is available to all, citizens, authorities and scientists so that they get a better picture of our environment.