¹ Intergovernmental Panel on Climate Change, Climate Change 2001: The Scientific Basis (Cambridge, UK: Cambridge University Press, 2001). This document was part of the Intergovernmental Panel on Climate Change's (IPCC's) Third Assessment Report (TAR).
² The IPCC developed revised GWPs for the Fourth Assessment Report (AR4). A complete list of revised GWPs were published in the errata to Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M. Tignor and H.L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 996 pp., (http://www.ipcc.ch/pdf/assessment-report/ar4/wg1/ar4-wg1-errata.pdf). 
³ The reporting of CFC emissions on Form EIA-1605 is optional. CFC emissions cannot be included in total inventory emissions since reliable net global warming potentials are not available for these gases. Reductions in CFC emissions may be reported but not registered.