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Assuming responsibility for emission reduction is an important part of participating in the global governance of climate change. Countries with a carbon neutrality target now cover about 75% of global greenhouse gas emissions. Carrying out fairness evaluations of their carbon neutrality targets provide a strong basis for the global carbon inventory. In this paper, the target years of carbon neutrality for major countries and regions under the global target of 2 °C and 1.5 °C are studied using the burden sharing model. On this basis, this paper simulates the possible pathways of carbon neutrality and evaluates the ambition of emission reduction targets in terms of annual emission reduction, per capita emission, and cumulative per capita emission. The results show that, from the perspective of equity, most of the developing countries cannot meet the global goal of 1.5 °C. The United States and the European Union nations could achieve carbon neutrality by 2050 by continuing their annual emission reductions under their existing NDC targets. However, to achieve carbon neutrality by 2060, China's annual emission reduction rate from 2030 to 2050 will be 6.7%, and the annual amount of emission reduction accounts for 51% of the global amount under the 1.5 °C target. Meanwhile, China would become the main force behind global cumulative emissions in the following decades. Thus, the emission reduction pathways China chooses will have an important impact on global climate mitigation progress. Based on the above research conclusions, this paper proposes that developed countries and developing countries should explore bilateral or multilateral cooperation in technology and finance in the field of climate change. Under the great pressure to achieve carbon neutrality, China needs to carry out research on the overall emission reduction pathways as soon as possible and clarify the paths at the scale of sectors, industries, provinces, and time stages. [ABSTRACT FROM AUTHOR]

To achieve the goal of 'Net-zero Europe' by 2050, the European Union (EU) has set up detailed policies in the fields of energy and climate. This paper summarizes the main characteristics of relevant policies in the EU and UK and their implications for China by reviewing these policies in the achievement of the carbon neutrality goal and other goals in the energy and climate fields. The characteristics of these energy and climate policies include: ① Top-down and bottom-up approaches are adopted to distribute the EU' s overall emission reduction targets to member states in accordance with the principle of fairness, and each member state formulates and adjusts its own goals to ensure the realization of the overall goals. ② Detailed transition plans are formulated for the power, industry, transportation, and building sectors; importance is attached to the application of new and renewable energy technologies such as solar, wind, and hydrogen energy; specific goals are set concerning coal power transition, nuclear energy development, energy efficiency improvement, carbon capture and storage, electrification, and building renovations; and the importance of energy security in transition planning is stressed. ③ A sound and mature emissions trading system and a fair transition mechanism are established to support the realization of the transition goals, and developing countries are helped to reduce emissions through technical dialogues and climate financing. To reach peak carbon emissions and achieve carbon neutrality, China should develop relevant roadmaps at national, sectoral, and provincial levels and strengthen R&D of key decarbonization technologies. At the same time, China should enhance its regulatory regime, and improve the carbon emissions trading system, the green financial system, and the just transition mechanism. [ABSTRACT FROM AUTHOR]