Vatican City
Vatican City has a reasonably well-developed transport network considering its size (consisting mostly of a piazza and walkways). A state that is long and wide, it has a small transportation system with no airports or highways. The only aviation facility in Vatican City is the Vatican City Heliport. Vatican City is one of the few independent countries without an airport, and is served by the airports that serve the city of Rome, Leonardo da Vinci-Fiumicino Airport, and to a lesser extent Ciampino Airport.
Geography of Vatican City
In July 2007, the Vatican accepted an offer that would make it the only carbon neutral state for the year, due to the donation of the Vatican Climate Forest in Hungary. The forest was to be sized to offset the year's carbon dioxide emissions.