This site, sponsored by the Norwegian University of Science and Technology, primarily consists of a blog, the footprint calculator, and an FAQ section. CFoN states that it provides carbon footprint data not included in the emissions inventories of the UN. The calculator allows users to view components (e.g., exports, imports, households, etc.) of the footprints of nations all over the world.
Resource URL: http://www.carbonfootprintofnations.com/