A woman installs a UN flag in the assembly room of the climate change conference at the Qatar National Convention Center in Doha on Nov 25, 2012, one day ahead of the opening of COP 18, or the 18th meeting of the Conference of Parties of the UN Framework Convention on Climate Change which will be attended by representatives from nearly 200 nations in a bid to reach an agreement on how to tackle rising global temperatures. [Photo/Xinhua]