and train station, heliport, post office, radio station (with extraterritorial antennas in Italy), military barracks, government palaces and offices, public plaza, part of an audience hall, old defensive wall marking the border, institutions of higher learning, and cultural/art centers. Environment 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. No trees have been planted under the project and the carbon offsets have not materialized. International agreements Party to: Ozone Layer Protection Signed, but not ratified: Air Pollution, Environmental Modification See also Geography of Italy Properties of the Holy See Index of Vatican City-related articles References Notes External links Interactive Vatican City Map