Military GHG emissions data reported by Parties to the UNFCCC has been examined to gauge its status, transparency and consistency.
Under guidelines published by the Intergovernmental Panel on Climate Change (IPCC), military fuel use should be reported under IPCC category 1.A.5 (Other, not elsewhere specified). This category includes all mobile fuel consumption, such as ships, aircraft and road vehicles. It also includes all stationary fuel consumption, such as heating buildings on military bases.
GHG emissions should be reported at the most disaggregated level of each source, but current guidelines allow aggregation to protect military information. But if they are aggregated, this means that emissions from military mobile and stationary fuel use cannot be properly distinguished in UNFCCC reporting.
The reporting and review requirements for UNFCCC Annex I and Non-Annex I parties vary. UNFCCC Annex I parties are classified as industrialised countries and economies in transition, with a requirement to submit an annual national inventory report (NIR).