Guardian: President Obama will face one of the most important moments of his presidency this year on Dec. 18, and he needs his entire cabinet to help him prepare for it over the next 11 months. Dec. 18 is the final day of the global climate meetings in Copenhagen, a day that will signify whether the world community has finally mustered the will to rein in soaring greenhouse gas emissions. That fixed date, combined with escalating scientific urgency and unparalleled political opportunity, make 2009 the …