Unmask My City by Greg McNevin

Unmask My City is a global air pollution and health initiative engaging doctors and health professionals in actions to improve urban air quality. Shot in 10 cities in 7 countries, each place was linked with consistent visuals to show a common global challenge. Images were created with the AirBeam air pollution monitoring and mapping system and custom built LED light masks, which show people being exposed to air pollution in real-time. Mask colours correspond to WHO standards: green = good, yellow/orange/red = risky & unhealthy air.