Mountains crack and the Earth collapses. Everyone wants to flee on the Ark to escape the chaos on the planet. Scenesfrom the Hollywood blockbuster 2012 send audiences into a state of panic in their cinema seats.
　　Climate change has sounded the alarm all over the world, and on December 7, 2009, 192 nations came together toattend the United Nations Climate Change Conference in Copenhagen, Denmark. At stake is the important task ofsigning a joint document to restrict the post-2012 greenhouse gas emissions. This approach may lead to the formingof a systematic framework against climate change and push forward the harmonious and sustainable developmentbetween mankind and nature.