Greek Prime Minister George Papandreou (R) welcomes pupils who handed him around 56,000 signatures of citizens and 2,500 cards of children asking for a deal against climate change in the Copenhagen conference in his office in parliament in Athens, capital of Greece, Dec. 9, 2009. The 20 children were accompanied by representatives of WWF Hellas and the Greek Office of Greenpeace who organized the campaign "Together for Change".[Marios Lolos/Xinhua]