"The purpose of this volume is to put our best and most current information in the hands of those who need it, in- cluding in particular the participants in the UNFCCC process. The IEA Secretariat is a contributor to the official Intergovernmental Panel on Climate Change (IPCC) methodologies for estimating greenhouse-gas emissions. The IEA’s energy data are the figures most often cited in the field. For these reasons, we felt it appropriate to publish this information in a comprehensive form." (Quoted from paper)