All data was calculated by the US Department of Energy's Carbon Dioxide Information Analysis Center (CDIAC), mostly based on data collected from country agencies by the United Nations Statistics Division.[1] Countries are ranked by their metric tonnes of carbon dioxide emissions per capita in 2009. The data only considers carbon dioxide emissions from the burning of fossil fuels and cement manufacture, but not emissions from land use such as deforestation. Emissions from international shipping or bunker fuels are also not included in national figures,[2] which can make a huge difference for small countries with important ports.