A member of environmental group Greenpeace, wearing a mask of Japanese Prime Minister Yukio Hatoyama (R), points to a large mock-up air ticket (L) to Copenhagen to attend the COP15 - the UN sponsored environmental meeting which will be held in December - during a demonstration outside Japan's National Diet building in Tokyo on October 29, 2009. Hatoyama announced at the UN General Assembly last month that Japan would reduce emissions by 25 percent from 1990 levels by 2020. Getty Images logo Getty Images 3 weeks ago

A member of environmental group Greenpeace, wearing a mask of Japanese Prime Minister Yukio Hatoyama (R), points to a large mock-up air ticket (L) to Copenhagen to attend the COP15 - the UN sponsored environmental meeting which will be held in December - during a demonstration outside Japan's National Diet building in Tokyo on October 29, 2009. Hatoyama announced at the UN General Assembly last month that Japan would reduce emissions by 25 percent from 1990 levels by 2020.