In February 2012, Milan faced a growing environmental crisis: air pollution had reached critical levels. Corriere Magazine commissioned me to document the situation through the work of ARPA technicians as they monitored air quality from the rooftops of the new Palazzo della Regione Lombardia and Milano Centrale Station. I crossed the city, photographing daily life under grey, oppressive skies. The visual language I chose amplified the sense of urgency, aiming to raise awareness about an invisible threat with very real consequences. This reportage stands as both documentation and a call to action.