The Group of 20 4th Ministerial meeting of the Gleneagles Dialogue on Climate Change, Clean Energy and Sustainable Development concluded in Chiba on Sunday as differences between developed and developing nations on how to share greenhouse gas emissions reduction responsibilities remained unsolved.

As rich nations urged the developing world to cut carbon dioxide emissions by absolute values, the latter called on the developed countries to bear more obligations in global anti-climate change efforts.

Former British prime minister Tony Blair delivers a speech during an opening session at the G20 meeting on climate change in Chiba, near Tokyo, March 15, 2008. The three-day G20 meeting of environment and energy officials comes after world nations agreed on the Indonesian island of Bali last December to launch two years of UN-led talks on a global climate pact. (Xinhua/Reuters Photo)