Members of the NOG group Oxfam wearing m

Members of the NOG group Oxfam wearing masks of the Group of Eight leaders (L-R) Dmitry Medvedev of Russia, Nicolas Sarkozy of France, Gordon Brown of England, Stephen Joseph Harper of Canada, George W. Bush of the United States, Yasuo Fukuda of Japan, Silvio Berlusconi of Italy and Angela Merkel of Germany hold CO2 balloons during a protest performance against the climate change at Sapporo in Japan's northern island of Hokkaido on July 7, 2008. The heads of state and government of the world's most powerful economies are meeting in the spa resort of Toyako on the northern Japanese island of Hokkaido. AFP PHOTO / Yoshikazu TSUNO (Photo credit should read YOSHIKAZU TSUNO/AFP via Getty Images)