The United Nations Climate Change Conference COP-21 has started in Paris. The heads of approximately 160 countries are paricipating in the summit. The panelists will discuss climate change issue, primarily problems connected with coal, petroleum products and natural gas, which produce carbon dioxide and methane. The motto of the COP-21 summit is “Last Chance”. The President of Mongolia, Ts.Elbegdorj left for Paris last Saturday, in order to attend the COP-21 summit.