Evolution of total GHG emissions (Gg CO2 eq presented in the third Andorran BUR (2019) GHG Coverage The following greenhouse gases are included in the NDC, according to the gases inventoried and reported in our BURs according to the 2006 IPCC Guidelines and subsequent revisions for the implementation of national GHG inventories: Carbon dioxide (CO2 ), methane (CH4 ), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulphur hexafluoride.