Heads of states and governments have begun to arrive at Copenhagen, to participate in the final leg of ongoing discussions on climate change. The Prime Minister Dr. Manmohan Singh is expected to arrive tomorrow to participate in the summit meet. US President and the Chinese Premier are also expected to reach Danish capital to join the deliberations. AIR correspondent Vijay Raina quoting official sources reports , with possibility of an agreement on global warming receding, the leaders will work out a political declaration .The UN Secretary General Ban Ki Moon who formally opened the summit level stage of the conference called upon world leaders for thrashing out all issues to strike an agreement on the issue now. He described it as the defining moment of the history, Mr. Ban Ki-moon described the negotiations ahead for the heads of the states and governments the most complex and ambitious ever to be undertaken by the world community. The executive secretary Yvo de Boer of the United Nations Framework Convention on Climate Change (UNFCCC), in an interview however said that the climate conference this year may not yield a new global climate treaty with every minor detail in place. But it will close with agreements on some vital issues. They include amount of green house gases to be reduced by industrialized and developing countries like India and China. The management of money for supplying green technology to poor nations and the kind of other help needed by them to reduce the emission levels. In a joint statement the Heads of ASEAN countries who have reached Copenhagen have reaffirmed that devolved countries must take lead and fix legally bound emission cuts for themselves as per the Kyoto Protocole. India has made it clear that the three disputed provisions that have come from the Alliance of Small Island States in the long term cooperative action track can not be accepted. Expressing serious concern that the developed countries are not changing their stance, Beijing described their attitude not only incomprehensible and unacceptable but will also have a serious impact on the negotiation process and hinder the Copenhagen Conference from achieving positive results.