Pula and the local office of the Croatian National Tourism Board decided to take part in this campaign following the proposal from the Irish Ambassador Tim Harrington.
Some other cities worldwide that take part in the Global Greening initiative are Rome, Rio de Janeiro, Sydney, New York or Munich whose landmarks such as the Colosseum, Christ the Redeemer statue, or the Opera House go green on 17 March, the day of Saint Patrick, the patron saint of Ireland, whose poetic name is Emerald Isle.