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Begin New Search Topic Decarbonization Political Geography Global Focus

1. Sovereigns on thinning ice: debt sustainability, climate impacts and adaptation

Author:
Matteo Calcaterra, Andrea Consiglio, Vincenzo Martorana, Massimo Tavoni, and Stavros Zenios
Publication Date:
05-2025
Content Type:
Working Paper
Institution:
Bruegel
Abstract:
A fundamental problem for sovereigns enacting climate policies is whether they can manage increasing debts as their economies suffer from adverse climate impacts. We develop stochastic debt sustainability analysis integrating a coupled climate-economy model with debt financing scenario optimisation, and stress test sovereign debt for representative countries globally under the Intergovernmental Panel on Climate Change marker narrative scenarios of climate change. The stress test combines socioeconomic and climate pathways with calibrated aleatory scenario trees of economic, fiscal and financial variables to generate forward-looking debt projections over the century. These projections incorporate climate-induced damages to economic growth, spanning the broad spectrum of impact functions from the literature. Our findings reveal significant risks to sovereign debt sustainability, particularly under high climate damages, that are large from mid-century. Expected costs increase by up to 3 percent of GDP under high climate impact in a world of regional rivalries, or 0.25 percent under low impact in a middle-of-the-road narrative, with considerable variation between countries. The long-run debts of highly impacted countries are unsustainable. We assess whether adaptation investments or fiscal consolidation can mitigate potential climate-debt crises. Public financing of reactive adaptation is a justified expenditure that breaks even but does not fully restore the debt sustainability of highly impacted high-debt countries. Maintaining public spending while ensuring debt sustainability appears infeasible under climate impacts.
Topic:
Climate Change, Governance, Macroeconomics, Fiscal Policy, Public Debt, and Decarbonization
Political Geography:
Global Focus

2. Global Futures Bulletin: The BRICS and the Decarbonization and Biodiversity Protection Challenges

Author:
Igarapé Institute
Publication Date:
01-2025
Content Type:
Special Report
Institution:
Igarapé Institute
Abstract:
The world faces an unprecedented convergence of environmental crises – climate change, pollution, and biodiversity loss – that collectively threaten the planet’s ecological balance and humanity’s future. Reversing the Triple Planetary Crisis necessitates urgent and coordinated action across all sectors and countries, accelerating the transition to low-carbon economies while protecting biodiversity are key challenges for the coming years. Countries that have joined the BRICS in its inception (Brazil, Russia, India, China, and South Africa) are increasingly an important geopolitical force in current global politics, and their individual and collective action is key to the success of concerted global action. The group’s recent expansion – BRICS+ includes Egypt, Ethiopia, Iran, and the United Arab Emirates (UAE), Indonesia joining in 2025 and Saudi Arabia finally formalizing its membership – offers an opportunity to boost the role of their New Development Bank (NDB) in bridging climate, biodiversity, and development finance, and aim for greater policy coherence for concerted global action across these agendas. Combined, BRICS countries are not only biodiversity and energy-rich but also contribute to a large share of greenhouse gas (GHG) emissions. This Strategic Paper examines the role of the expanded BRICS+ and explores whether and how this “mini-multilateral” grouping, with its considerable human and technological capacity, can address two major global challenges: accelerating decarbonization and protecting biological diversity. The discussion is framed around the opportunities and challenges faced by the member countries to increase their ambitions and become leading voices in these agendas – not only for BRICS countries (some of which are among the most biodiverse in the world) but also for the wider international community. Without a strong commitment by BRICS countries (individually and as a group) the world will fail to accelerate action on decarbonization and biodiversity protection.
Topic:
Climate Change, Pollution, BRICS, Decarbonization, Biodiversity, and Minilateralism
Political Geography:
Russia, China, South Africa, Brazil, and Global Focus

3. Blockchain and Energy Understanding Opportunities and Challenges

Author:
Nicola De Blasio and Charles Hua
Publication Date:
02-2024
Content Type:
Special Report
Institution:
Italian Institute for International Political Studies (ISPI)
Abstract:
The transition to a decarbonized, decentralized, and digitized energy future will unlock new business, policy, and technology models with the associated opportunities and challenges. Innovative technologies like blockchain, a shared, decentralized, and immutable digital ledger system that processes, validates, and manages digital transactions based on algorithmic consensus protocols, may enable this transition. Potential blockchain applications in energy range from enhanced distributed energy resources and peer-to-peer energy trading regimes to more robust grid management and smart energy contracts. There has been significant hype around blockchain’s potential impact in shaping economic and energy systems. Yet, it is essential to separate signal from noise and assess blockchain’s potential impact. This paper aims to provide a comprehensive analysis by identifying key use cases and then addressing which key characteristics blockchain technologies need to bring to fruition to support them. It also proposes an analytical framework to evaluate the potential impact of eight applications based on four key criteria: feasibility, maturity, scalability, and value additivity.
Topic:
Science and Technology, Innovation, Blockchain, Decarbonization, Energy, and Geoeconomics
Political Geography:
Global Focus

4. Populist opposition is threatening progress on climate change

Author:
Edoardo Campanella and Robert Z. Lawrence
Publication Date:
07-2024
Content Type:
Working Paper
Institution:
Peterson Institute for International Economics (PIIE)
Abstract:
Driven by the push to decarbonize the world and achieve net zero emissions by 2050, a new anti-elite revolt is in the making in developed economies: If mainstream parties ignore the losers of the green transition as they did with globalization, climate populism not only will slow the adoption of climate policies but could also shake Western democracies. Climate policies are a perfect target for populist rhetoric: They rely on expert knowledge, entail globalist thinking and action, and the counterfactual nature of their benefits—avoiding disasters that would otherwise happen—gives ample fodder for conspiracy theories. And their costs are unevenly shared, hitting those at the bottom of the income distribution significantly harder than those at the top. Climate populism is particularly a problem on the far right, where doubts about science and opposition to international cooperation are strongest. Policies need to deal with this rising political opposition. Given the depth of their grievances, and as it is often the case with populism, it is unlikely that voters antagonistic to climate policies will be persuaded by rational arguments. What will change their behavior are economic incentives. If green technologies are cheaper than fossil fuel ones, they will be adopted to save money rather than the planet. Thus the costs of the green transition need to be reduced through more open trade in the short run and more innovation in the long run. In addition, those who support climate policies need to be mobilized through more engaging political strategies, more emotional narratives, and more bottom-up policy approaches.
Topic:
Climate Change, Populism, Decarbonization, and Green Transition
Political Geography:
Global Focus

5. Climate versus trade? Reconciling international subsidy rules with industrial decarbonisation

Author:
David Kleimann
Publication Date:
02-2023
Content Type:
Policy Brief
Institution:
Bruegel
Abstract:
The vast environmental subsidies that may be required for the transition to net-zero greenhouse gas emissions are starting to generate international trade and political frictions between the world’s largest economies. This puts (supra-)national industrial decarbonisation efforts on a collision course with international subsidies rules and national countervailing duty (ie anti-foreign subsidy) laws and regulations. International cooperation will be essential to defuse such tensions before they escalate and impede effective climate policy rollouts, and before they lead to economic countermeasures that create new barriers to trade in environmental goods. This requires agreement on permissible environmental subsidy practices that minimise distortions. Meanwhile, it will be crucial to provide financial transfers to assist poorer economies with industrial decarbonisation at the same time as those poorer economies are suffering from the cross-border negative economic impacts of otherwise net-global-welfare enhancing environmental subsidies paid out by wealthy countries. Various forums can host the technical and political negotiations necessary to set the parameters of net global-welfare enhancing subsidies. These include the G7, the G20, the Organisation for Economic Co-operation and Development, the World Trade Organisation’s Trade and Environment Committee and WTO Trade and Environmental Sustainability Structured Discussions, and the Coalition of Trade Ministers on Climate.
Topic:
Climate Change, Political Economy, Trade, Carbon Emissions, Subsidies, and Decarbonization
Political Geography:
Global Focus

6. How does decarbonization change the fiscal equation?

Author:
Ruud de Mooji and Vitor Gaspar
Publication Date:
11-2023
Content Type:
Working Paper
Institution:
Peterson Institute for International Economics (PIIE)
Abstract:
This paper explores the fiscal implications for countries of global climate mitigation in the medium term. If climate action is unilateral, it might be limited in scope and rely more on subsidies and spending to avert political constraints. This can put fiscal sustainability at risk. Coordinated carbon pricing or other mitigation policy can more effectively put the world on a path to 1.5 to 2°C above pre-industrial temperatures, as agreed in Paris in 2015, while helping manage fiscal and political constraints. Coordination could be initiated by large players, such as China, the United States, India, the African Union, and the European Union. The authors find that the implications for fiscal revenues over time are 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, although much of this spending could be more efficiently financed through higher sectoral prices and taxes rather than through the general budget. Countries will also need funds for compensating vulnerable households, industries, and 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 significant. Hence, as mitigation strategies improve fiscal balances, they can accommodate development spending needs. Revenue sharing at the global level would make an historical contribution to breaching the financial divide between rich and poor countries.
Topic:
Climate Change, Fiscal Policy, Decarbonization, and Energy
Political Geography:
Global Focus

7. The Uncertain Costs of New Nuclear Reactors: What Study Estimates Reveal about the Potential for Nuclear in a Decarbonizing World

Author:
Matt Bowen, Emeka Ochu, and James Glynn
Publication Date:
12-2023
Content Type:
Special Report
Institution:
Center on Global Energy Policy (CGEP), Columbia University
Abstract:
Models that run decarbonization scenarios to meet mid-century goals for mitigating climate change almost always include a significant role for nuclear energy. The source’s projected level of deployment, however, remains uncertain, largely due to a wide range of estimated costs for new builds. Other factors that make it hard to gauge nuclear’s portion of the future energy mix include whether policies advancing low-carbon technologies will be enacted, the degree of public support for transmission siting and available low-carbon energy sources, whether new reactor technologies and fuels will change the investment equation, and how quickly “competitor” sources such as carbon capture and sequestration, renewables, and storage reduce costs. This report, part of ongoing research into nuclear energy at the Center on Global Energy Policy at Columbia University SIPA, examines the economics of new nuclear facilities for electricity generation—whether building them out makes sense financially as part of efforts to reduce greenhouse gas emissions as power demand grows across the globe. Insights into costs can be gleaned by reviewing the history of construction delays and cost overruns in the United States, international experiences that have fared better and worse, and studies that model a transitioning energy system. Studies reviewed in this report estimate new US reactor costs generally ranging from $3,000/kilowatt (kW) to $6,200/kW based on a variety of reactor designs and cost reduction curves assumed for subsequent years. Internationally, new reactor costs vary significantly by country, depending in part upon factors such as the cost of labor and whether projects involve multiple reactor builds (with attendant efficiencies in manufacturing and construction).
Topic:
Climate Change, Carbon Emissions, Decarbonization, and Nuclear Energy
Political Geography:
Global Focus and United States of America

8. The role of competition in the transition to climate neutrality

Author:
Georg Zachmann
Publication Date:
06-2022
Content Type:
Working Paper
Institution:
Bruegel
Abstract:
The transition to climate neutrality requires the reallocation of production factors from polluting activities to non-polluting activities. The main push for this reallocation will come from governmental decarbonisation targets that are translated into stringent climate policy tools, such as carbon pricing and emissions standards. But the complex process of recombining production factors will require the coordination of millions of individuals and firms. The efficiency of this recombination process will be a main driver of the cost of the transition. Based on a consistent analytical framework, I argue that much more political attention should be paid to the markets and regulators that guide the re-allocation of production factors, to bring them in line with a carbon-neutral economy at the best service of European consumers. Three main issues should be considered: 1. The transition will change the role and efficiency of markets in allocating resources; 2. Competitive markets can make the transition more efficient; 3. In some areas, a too-narrow focus on competition can be detrimental, and needs to be discussed. To improve the institutions for resource allocation in the transition, policymakers should revisit three levels of intervention: 1) competition rules and enforcement should be adjusted to meet the new challenges of the transition; 2) efficient markets that are central to a climate-neutral economy – such as for electricity, emission rights or circular logistics – need to be properly designed; 3) the advantages and disadvantages of more direct state control in specific sectors should be revisited in light of the challenges of the transition. In summary, policymakers need to get away from simplistic state-or-market narratives. The focus should be on developing politically feasible frameworks for leveraging the benefits of competition for efficient resource allocation in the transition. Institutions should not focus solely on static efficiency, but must forcefully encourage investments in new systems and innovation. The role of institutions that determine resource allocation in the transition is an underappreciated but crucial area for future research and policy action.
Topic:
Climate Change, Institutions, Pollution, Carbon Emissions, Neutrality, and Decarbonization
Political Geography:
Global Focus

9. Tallying Updated NDCs to Gauge Emissions Reductions in 2030 and Progress toward Net Zero

Author:
James Glynn, Kristin Smith, Melissa Lott, Lilly Yejin Lee, Jordan Shenhar, and Pekun Bakare
Publication Date:
03-2022
Content Type:
Working Paper
Institution:
Center on Global Energy Policy (CGEP), Columbia University
Abstract:
The Paris Agreement included two particularly crucial innovations for supporting greenhouse gas emissions reductions: a voluntary, bottom-up nationally determined contribution (NDC) and a ratchet mechanism. The latter change meant that, in the run-up to the 26th Conference of the Parties (COP26) to the United Nations Framework Convention on Climate Change in Glasgow last fall, countries prepared updated NDCs—specific commitments to reduce emissions by 2030—that outlined their increased ambition. After the adoption of the Glasgow Climate Pact, many observers have focused on what these NDCs, as well as countries’ pledges to reach net-zero greenhouse gas emissions by certain dates, could mean for the world’s ability to limit global temperature rise to well below 2° Celsius—the central goal of the Paris Agreement. But another critical question remains: how would these targets and ambitions drive near-term emissions reductions. Understanding the answer can provide insights to investors, utilities, or others with decision time horizons of 10–15 years and that wish to align with net-zero ambitions. This report, part of the energy systems modeling program at Columbia University’s Center on Global Energy Policy, aims to assess the alignment between updated NDCs and current net-zero pledges for policy makers and industry leaders to gain insight into their own national and corporate decarbonization outlooks. It considers all classes of NDCs, including: 1) percentage reduction in emissions relative to a historical base year level, 2) percentage reduction compared to a 2030 business-as-usual scenario, and 3) reduction in emissions intensity of gross domestic product. It presents an estimate of the percentage reduction in greenhouse gases (GHGs) from 2015 to 2030 for all commitments outlined in NDCs for countries that also have a net-zero target. Overall, this analysis finds that the NDCs of economies with 2050 net-zero pledges would lead to a 27 percent reduction in GHG emissions by 2030, relative to 2015. However, countries with post-2050 net-zero pledges are projected to increase their emissions by 10 percent between 2015 and 2030, lowering the net global emission reduction to 9 percent over this period.
Topic:
Environment, Green Technology, Carbon Emissions, and Decarbonization
Political Geography:
Global Focus

10. Hydrogen: A Hot Commodity Lacking Sufficient Statistics

Author:
Anne-Sophie Corbeau
Publication Date:
04-2022
Content Type:
Commentary and Analysis
Institution:
Center on Global Energy Policy (CGEP), Columbia University
Abstract:
Hydrogen has become one of the most debated topics in the energy industry. As an energy vector,[1] hydrogen has been touted as a possible path to decarbonize energy sectors that are considered difficult to electrify, such as heavy-duty transport. While hydrogen expansion faces challenges associated with introducing it into new sectors and decreasing the cost of green (or low-emission) hydrogen, major economies such as China, the EU, and the United States have been looking to integrate its use into their decarbonization strategies.[2] Demand for hydrogen could more than quintuple in a global net-zero-carbon-emissions scenario.[3] Given that hydrogen’s role is expected to increase significantly over the coming decade and expand into new sections of the energy system, it is essential to have more clarity on its current and future demand profile. The energy community is used to relying on statistics for more traditional fuels such as oil or natural gas; they enable analysts and investors to follow market developments, identify trends, and anticipate investment needs and opportunities. For policy makers, they can help to measure progress toward decarbonization objectives or against targets set within their hydrogen strategies as well as help them compare their activity with other countries’ developments. Understanding demand, production, and trade through data transparency is also a key element in energy security.
Topic:
Energy Policy, Science and Technology, Decarbonization, and Hydrogen
Political Geography:
Global Focus