This indicator corresponds to the aggregated annual national anthropogenic emissions of the main greenhouse gases (GHG): carbon dioxide (CO2), nitrous oxide (N2O), methane (CH4), hydrosulfuric carbones halocarbures (HFC), perfluorinated hydrocarbons (PFC) and sulfur hexasulfuoride (SF6).
Energy intensity is a measure of the energy efficiency of a nation’s economy. It is calculated as the ratio of energy consumption to Gross Domestic Product.