Energy-saving target prediction from the perspective of carbon dioxide emissions reduction

November 25, 2009, the Chinese government officially announced the action to control greenhouse gas emissions targets, 2020 carbon dioxide emissions per unit of GDP decreased 40 45% compared to 2005, Non-fossil fuels in primary energy share to about 15%. Based on the objectives of carbon dioxide emissions per unit of GDP decreased 40-45% to 2020, this paper analized the intensity of carbon dioxide emissions per unit of GDP of the main drivers, reveals the quantitative relationship among the carbon intensity of quality of economic growth, energy efficiency and optimized the energy structure. Finally, the paper predicted China´s future energy-saving targets in carbon emissions constraints.