Simon Black, Ian W.H. Parry, and Karlygash Zhunussova
Urgent action to cut greenhouse gas (GHG) emissions is needed now. Early next year, all countries will set new emissions targets for 2035 while revising their 2030 targets. Global GHGs must be cut by 25 and 50 percent below 2019 levels by 2030 to limit global warming to 2°C and 1.5°C respectively. But current targets would only cut emissions by 12 percent, meaning global ambition needs to be doubled to quadrupled. Further delay will lead to an ‘emissions cliff edge’, implying implausible cuts in GHGs and putting put 1.5°C beyond reach. This Note provides IMF staff’s annual assessment of global climate mitigation policy. It illustrates options for equitably aligning country targets with the Paris Agreement’s temperature goals. It also provides guidance on modelling needed to set emissions targets and quantify climate mitigation policy impacts.
Rudolfs Bems, Luciana Juvenal, Weifeng Liu, and Warwick J. McKibbin
This paper assesses the economic effects of climate policies on different regions and countries with a focus on external adjustment. The paper finds that various climate policies could have substantially different impacts on external balances over the next decade. A credible and globally coordinated carbon tax would decrease current account balances in greener advanced economies and increase current accounts in more fossil-fuel-dependent regions, reflecting a disproportionate decline in investment for the latter group. Green supply-side policies—green subsidy and infrastructure investment—would increase investment and saving but would have a more muted external sector impact because of the constrained pace of expansion for renewables or the symmetry of the infrastructure boost. Country characteristics, such as initial carbon intensity and net fossil fuel exports, ultimately determine the current account responses. For the global economy, a coordinated climate change mitigation policy package would shift capital towards advanced economies. Following an initial rise, the global interest rates would fall over time with increases in the carbon tax. These external sector effects, however, depend crucially on the degree of international policy coordination and credibility.
Large reductions in global emissions are needed for the world to be on track to meet global temperature goals. Asia-Pacific countries have a critical role in emissions reduction given their large and rising share in global emissions. This paper discusses the main opportunities and behavioral responses for reducing emissions, and commonly used mitigation instruments. It then considers key design issues for carbon pricing, with a focus on emissions trading schemes (ETS), describes measures to overcome the obstacles to carbon pricing, and discusses experiences with carbon pricing relevant for Asia-Pacific economies. Lastly, the paper covers complementary policy reforms, including reinforcing mitigation instruments, public investment, fuel tax reform, green industrial policies, and supporting reforms to the energy sector. Carbon pricing, including ETSs can be the centerpiece of climate mitigation strategies for most countries, particularly if ETSs are designed to mimic some of the administrative and economic attractions of carbon taxes and implemented appropriately.
Simon Black, Ruud de Mooij, Vitor Gaspar, Ian W.H. Parry, and Karlygash Zhunussova
Internationally coordinated climate mitigation policies can effectively put the world on a path toward achieving the agreed Paris temperature goals. Such coordination could be initiated by large players, such as China, the US, India, the African Union, and the European Union. We find that the implications for fiscal revenues over time will be shaped by a combination of rising carbon prices, the gradual erosion of existing fuel tax bases, and possible revenue sharing arrangements. Public spending rises during the transition to build green public infrastructure, promote innovation, and support clean technology deployment. Countries will also need financing for compensating vulnerable households and industries, and to transfer funds to poor countries. With well-designed climate-fiscal policy relying on carbon pricing, global decarbonization will have anything from moderately positive to moderately negative impacts on fiscal balances in high-income countries. For middle and low-income countries, net fiscal impacts are generally positive and can be significant. Revenue sharing at the global level would make an historical contribution to breaching the financial divide between rich and poor countries.
Ms. Era Dabla-Norris, Mr. Thomas Helbling, Kenichiro Kashiwase, Giacomo Magistretti, and Mouhamadou Sy
Asia and the Pacific’s green transition will have far-reaching implications for the global economy. Over the past decades, the region has become the engine of global economic growth. With relatively heavy reliance on coal and high energy intensity, the region has recently become the largest contributor to growth in global GHG emissions, accounting for nearly 40 percent of the total emissions in 2020. Achieving net zero by 2050 requires an energy transition at an unprecedented scale and speed, even as the region must ensure energy security and affordability. The region must also address its vulnerability to climate change as it comprises many countries highly exposed to climate hazards increasing in severity and frequency with global warming. If managed well, the green transformation in Asia and the Pacific will create opportunities for economies not only in the region, but also around the world for inclusive and sustainable growth. The global economy is still far from achieving net zero by 2050, and the Asia and the Pacific region must play its part to deliver on mitigation and adaptation goals. Understanding Asia’s perspectives on the constraints and issues with climate ambitions, climate policy actions, and constraints is central for devising climate strategies to meet climate goals. To this end, this chapter draws on novel surveys of country authorities and public in the region to distill climate ambitions and challenges faced and identify sources of major gaps in achieving mitigation and adaptation goals. Measures to help close the gaps are drawn from policy discussions with country authorities in bilateral surveillance and related studies.
Damien Capelle, Divya Kirti, Nicola Pierri, and German Villegas Bauer
Using self-reported data on emissions for a global sample of 4,000 large, listed firms, we document large heterogeneity in environmental performance within the same industry and country. Laggards—firms with high emissions relative to the scale of their operations—are larger, operate older physical capital stocks, are less knowledge intensive and productive, and adopt worse management practices. To rationalize these findings, we build a novel general equilibrium heterogeneous-firm model in which firms choose capital vintages and R&D expenditure and hence emissions. The model matches the full empirical distribution of firm-level heterogeneity among other moments. Our counter-factual analysis shows that this heterogeneity matters for assessing the macroeconomic costs of mitigation policies, the channels through which policies act, and their distributional effects. We also quantify the gains from technology transfers to EMDEs.
Jean Chateau, Ms. Florence Jaumotte, and Gregor Schwerhoff
We use a global computable general equilibrium model to compare the economic performance of alternative climate policies along multiple dimensions, including macroeconomic outcomes, energy prices, and trade competitiveness. Carbon pricing which keeps the aggregate cost lower and preserves better the overall competitiveness than across-the-board regulation is the first-best policy, especially in energy intensive and trade exposed industries. Regulations and feebates are good alternatives in the power sector, where technological substitution is possible. Feed-in subsidies, if used alone, are not cost effective.
Mr. Simon Black, Jean Chateau, Ms. Florence Jaumotte, Ian W.H. Parry, Gregor Schwerhoff, Sneha D Thube, and Karlygash Zhunussova
To contain global warming to between 2°C and 1.5°C, global greenhouse gas emissions must be cut 25 to 50 percent below 2019 levels by 2030. Even if fully achieved, current country pledges would cut global emissions by just 11 percent. This Note presents illustrative options for closing this ambition gap equitably and discusses their economic impacts across countries. Options exist to accelerate a global just transition in this decade, involving greater emission reductions by high-income countries and climate finance, but further delays in climate action would put 1.5°C beyond reach. Global abatement costs remain low under 2°C-consistent scenarios, with burdens rising with income levels. With efficient policies of carbon pricing with productive revenue use, welfare costs become negative when including domestic environmental co-benefits, before even counting climate benefits. GDP effects from global decarbonization remain uncertain, but modeling suggests they exceed abatement costs especially for carbon-intensive and fossil-fuel-exporting countries. Ratcheting up climate finance can help make global decarbonization efforts more progressive.
Jean Chateau, Ms. Florence Jaumotte, and Gregor Schwerhoff
This paper discusses and analyzes various international mechanisms to scale up global action on climate mitigation and address the policy gap in this area. Despite the new commitments made at COP 26, there is still an ambition and a policy gap at the global level to keep temperature increases below the 2°C agreed in Paris. Avoiding the worst outcomes of climate change requires an urgent scaling up of climate policies. Recent policy proposals include the idea of common minimum carbon prices, which underlie the IMF’s international carbon price proposal (Parry, Black, and Roaf 2021) and the climate club proposal of the German government. While global carbon prices are not a new idea, the new elements are the use of carbon price floors—which allow countries to do more if they wish—and the differentiation of carbon price floors by level of development. In the absence of international coordination, countries with ambitious climate policies are considering introducing a border carbon adjustment mechanism to prevent domestic producers from being at a competitive disadvantage due to more ambitious domestic climate policies. An interesting question from the global perspective is whether border carbon adjustment would deliver substantial additional emissions reductions or incentivize other countries to join a carbon price floor agreement.
This paper inquires into how individual attitudes to climate issues and support for climate policies have evolved in the context of the pandemic. Using data from a unique survey of 14,500 individuals across 16 major economies, this study shows that the experience of the COVID-19 pandemic increased concern for climate change and public support for green recovery policies. This suggests that the global health crisis has opened up more space for policy makers in key large economies to implement bolder climate policies. The study also finds that support for climate policies decreases when a person has experienced income and/or job loss during the pandemic. Protecting incomes and livelihoods in the near-term is thus important also from a climate policy perspective.