Greenpeace has produced a series of graffiti actions in Strasbourg, to urge the authorities to react to air pollution. In recent days, while Strasbourg suffocated under fine particles, dozens of "clean" graffiti have blossomed on the walls and sidewalks to denounce air pollution. "We want to breathe", "Strasbourg, suffocate, air! This operation, led by Greenpeace aims to encourage local authorities to implement a proactive policy to improve air quality.