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In the last few years, because of the global climate change that global warmth cause when turning, the mankind''s existence environment suffers the tremendous challenge, its reason lies in the excessively emission of the greenhouse gas, having already exceeded the degree that the Earth cans carry. And the main source of the greenhouse gas lies in the usage of the petrochemical fuel, but the petrochemical fuel is nowadays the most widely accepted and necessary energy currently. Cause energy of subject already not at is limit to supply in the foundation of a nation''s body with a balance of need of problem, but promote to an environmental protection of the energy subject of the level. The study the main content, mainly is aim at the search case examples in all countries various energy efficiency of analysis more, includes﹕ the primary energy type、the energy supply and generate electricity of this example, average per capita energy consumes, average per capita carbon dioxide emission and join the weather factor, and join the comparison of the energy intensity , the carbon dioxide intensity of the economic activities factor and compare with elasticity of the developed nation and the developing country energy. And the case example national average per capita of each section ﹙industry, transportation, business, residence, the agriculture ﹚ consumes the trend analysis of the energy in the last decade. To understands the trend and merit and shortcoming that a national energy of these cases develops, to be our country reference of the energy development in future that energy lack of extremely. Study although the result manifestation ﹕ our country have already been included in the developed nation, its various index signs of energy efficiencies all still keep the trend of the developing country, and the level of the developed nation, also have a margin, so that my country is on various energies efficiency index sign, also having very potential. It is international community that the energy efficiency promote makes every effort the direction of the development currently, it the energy strategy that is the most economic, the most safe and can get instant results most , is the target that our country must dedicate the development first. Future energy development of our country necessarily and deeply influenced by "Kyoto Protocol" and " nuclear free homeland". Although our country " non-Kyoto Protocol" the signatory state, in future probably the developing country is subjected to" Kyoto Protocol " standard together, past our country must respond in advance, improving the energy structure and diversity of energy,, etc.; And the nuclear energy still occupies one important position on my country energy supply currently, in order to practice the target of" nuclear free homeland ", must program the adjustment over a long period of time on my country energy structure, in considering each level of the environmental protection, economy development, society stability, adjust gradually, will decline to go to the influence of the whole nation to low.
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