Ossigeno Bene Comune (Oxygen: a commons) is a multifaceted program promoted by the Metropolitan City of Naples (including around 100 municipalities and 3 million inhabitants) to mitigate and adapt to climate change. The program has 12 objectives and an almost 15 million budget. Among those objectives, Ossigeno Bene Comune promotes the planting of trees in urban spaces, the greening of public schools, the promotion of measures to reduce CO2 emissions, and of educational programs.