«First official draft on climate deal». COP15 Copenhagen, Naciones Unidas, Conferencia sobre Cambio climático, del 7 al 18 e diciembre de 2009. Consultado el 12 de diciembre de 2009.
«China: the US and EU must present deeper cuts». COP15 Copenhagen, Naciones Unidas, Conferencia sobre Cambio climático, del 7 al 18 e diciembre de 2009. Consultado el 12 de diciembre de 2009.
«US fires back at China». COP15 Copenhagen, Naciones Unidas, Conferencia sobre Cambio climático, del 7 al 18 e diciembre de 2009. Consultado el 12 de diciembre de 2009.
Casa BlancaArchivado el 24 de enero de 2010 en Wayback Machine., discurso del presidente en Copenhague : "Now, this progress did not come easily, and we know that this progress alone is not enough. Going forward, we're going to have to build on the momentum that we've established here in Copenhagen to ensure that international action to significantly reduce emissions is sustained and sufficient over time. We've come a long way, but we have much further to go."
Casa BlancaArchivado el 24 de enero de 2010 en Wayback Machine., discurso del presidente en Copenhague : "Now, this progress did not come easily, and we know that this progress alone is not enough. Going forward, we're going to have to build on the momentum that we've established here in Copenhagen to ensure that international action to significantly reduce emissions is sustained and sufficient over time. We've come a long way, but we have much further to go."
