A major worldwide push to increase energy efficiency is an essential part of these efforts, resulting in the annual rate of energy intensity improvements averaging 4% to 2030 вЂ“ about three-times the average rate achieved over the last two decades. In the net-zero emissions pathway presented in this report, the world economy in 2030 is some 40% larger than today but uses 7% less energy. The path to net-zero emissions is narrow: staying on it requires immediate and massive deployment of all available clean and efficient energy technologies. Reaching net-zero emissions globally by 2050 is a critical and formidable goal Getting to net zero will involve countless decisions by people across the world, but our primary aim is to inform the decisions made by policy makers, who have the greatest scope to move the world closer to its climate goals. We also recognise that the route mapped out here is a path, not necessarily the path, and so we examine some key uncertainties, notably concerning the roles played by bioenergy, carbon capture and behavioural changes. The report provides a global view, but countries do not start in the same place or finish at the same time: advanced economies have to reach net zero before emerging markets and developing economies, and assist others in getting there. We highlight the priority actions that are needed today to ensure the opportunity of net zero by 2050 вЂ“ narrow but still achievable вЂ“ is not lost. It is designed to maximise technical feasibility, cost-effectiveness and social acceptance while ensuring continued economic growth and secure energy supplies. The pathway described in depth in this report achieves this objective with no offsets from outside the energy sector, and with low reliance on negative emissions technologies. In this Summary for Policy Makers, we outline the essential conditions for the global energy sector to reach net-zero CO 2 emissions by 2050. Further delay in acting to reverse that trend will put net zero by 2050 out of reach. Global emissions fell in 2020 because of the Covid-19 crisis but are already rebounding strongly as economies recover. The continuation of that trend would be consistent with a temperature rise in 2100 of around 2.1 вЊ.

Moreover, even if successfully fulfilled, the pledges to date would still leave around 22 billion tonnes of CO 2 emissions worldwide in 2050. However, most pledges are not yet underpinned by near-term policies and measures. The number of countries that have pledged to achieve net-zero emissions has grown rapidly over the last year and now covers around 70% of global emissions of CO 2. Commitments made to date fall far short of what is required by that pathway. The global pathway to net-zero emissions by 2050 detailed in this report requires all governments to significantly strengthen and then successfully implement their energy and climate policies. This special IEA report sets out a pathway for achieving this goal, resulting in a clean and resilient energy system that would bring major benefits for human prosperity and well-being. A huge amount of work is needed to turn todayвЂ™s impressive ambitions into reality, especially given the range of different situations among countries and their differing capacities to make the necessary changes. The growing political consensus on reaching net zero is cause for considerable optimism about the progress the world can make, but the changes required to reach net-zero emissions globally by 2050 are poorly understood. This calls for nothing less than a complete transformation of how we produce, transport and consume energy. Reducing global carbon dioxide (CO 2) emissions to net zero by 2050 is consistent with efforts to limit the long-term increase in average global temperatures to 1.5ЛљC. The energy sector is the source of around three-quarters of greenhouse gas emissions today and holds the key to averting the worst effects of climate change, perhaps the greatest challenge humankind has faced.

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