
The World Meteorological Organization predicts that a ‘super El Niño’ is building. This has been nicknamed ‘Godzilla’. If forecasts are correct, this will be the most extreme El Niño in 1000 years.
El Niño is a natural phenomenon. It occurs when the surface temperatures in the central and eastern tropical Pacific Ocean warm and cause the trade winds that typically blow from east to west across the Pacific Ocean to weaken or even reverse direction. As well as increasing global temperatures and causing intense heatwaves, it can result in droughts in some parts of the world, such as eastern Australia, south-east Asia and southern Africa, and intense rain and flooding in parts of South America, eastern Africa and south-western North America.

Typically, in an El-Niño event, the surface temperature of the central-eastern equatorial Pacific Ocean rises by 1°C to 1.5°C above the average. In the current El Niño, it is forecast to rise by up to 4°C by the end of 2026 and into 2027. It is already between 2.2°C and 2.6°C above the average. The effects could be catastrophic and hence the term ‘Godzilla’.
Although El Niño is a natural phenomenon, its severity is a direct result of climate change. This in turn is a direct result of economic decisions, and the effects will have severe economic consequences.
The economic causes
Climate change is an external cost of private economic decisions. When people or organisations burn fossil fuels, the climate costs of the CO2 emissions are not borne by the emitter. They are an external cost. This is illustrated in the diagram below, which shows the costs and benefits of electricity production from fossil fuels. (Click here for a PowerPoint.)
In this example, to make things simple, we assume that the external climate costs begin with the first unit of electricity generated and increase at a constant rate. The marginal social cost (MSC) of electricity generation equals the marginal private costs (MPC) to the generating company plus the marginal external cost in production MECP.
As you can see, the MSC curve is above the MPC curve. The vertical distance between them is equal to the MECP. It is also assumed that there are no externalities in consumption, which means that the marginal social benefit (MSB) curve is the same as the marginal private benefit (MPB) curve.
Competitive market forces, with producers and consumers responding only to private costs and benefits, will result in a market equilibrium at point a: i.e. where demand equals supply. The market equilibrium price is Ppc, while the market equilibrium quantity is Qpc. At Ppc, with no externalities on the consumption side, MPB is equal to MSB. The market price reflects both the private and social benefits from the last unit consumed. However, the presence of external costs in production means that MSC > MPC.
The socially optimal output would be Q*, where P = MSB = MSC, achieved at the socially optimal price of P*. This is illustrated at point c and clearly shows how external costs of production in a perfectly competitive market result in overproduction: i.e. Qpc > Q*. From society’s point of view, too much electricity is being produced from fossil fuels.
Total social surplus equals consumer surplus plus producer surplus minus the external costs. At the market equilibrium (Qpc) this is areas eaPpc+ Ppcaf – fba (or hjk, as it is the same size). At the socially optimal level of output (Q*) total social surplus is areas ecP* + P*cgf – fcg (or hlm).
Although consumer-plus-producer surplus is higher at the market equilibrium (Qpc) than at the socially optimum output (Q*) by the area cag, the external costs are higher still by the area cbag (or ljkm). Therefore, total social surplus at the market equilibrium is smaller than at the socially optimal point by area abc. This is a deadweight welfare loss and represents the excess of social costs over social benefits at all outputs above Q*. Put another way, moving from Qpc to Q* would represent a gain in social surplus of the area abc, as the fall in external costs outweighs the fall in consumer-plus-producer surplus.
One of the reasons why external environmental costs cause problems in a free-market economy is that no one has legal ownership of the atmosphere. Therefore, nobody has the ability either to prevent or to charge for their use as a ‘dumping ground’ for CO2. Such a ‘market’ is missing. Control must, therefore, be left to the government, international organisations, local authorities or regulators.
But such control is often too little. For example, when President Trump came to office in January 2025, he announced that the USA would withdraw from the UN’s Paris Agreement on climate change and that his policy towards oil production would be to ‘drill, baby, drill’. Indeed, governments globally spend hundreds of billions of dollars a year in subsidising oil, gas and coal production and its use, partly from pressure from the fossil fuel industry and partly to reduce the cost of living for consumers. This embeds fossil fuel dependence.
Game theory can help to explain the slow process of carbon reduction. For an individual country, such as the USA, it might argue that its optimum solution would be for other countries to cut their emissions, while maintaining its own levels. This approach would yield most of the benefits to the USA and none of the costs. However, when all countries argue like this, no progress is made. It’s a prisoners’ dilemma. Only if countries believe that the other countries will (a) ratify an agreement to cut emissions and (b) stick to the approved terms, is the agreement likely to succeed. This requires trust on all sides as well as the ability to monitor the outcomes.
Another major problem area concerns equity. Most countries will feel that they are being asked to do too much and that others are being asked to do too little. High-income countries will want to adopt a grandfathering approach. The starting point with this approach would be current levels of pollution. Every country would then be required to make the same percentage cut. Low-income countries, on the other hand, will want the bulk of the cuts, if not all of them, to be made by the rich countries. After all, the rich countries produce much higher levels of pollutants per capita than do the poor countries, and curbing growth in low-income countries would have a far more serious impact on levels of absolute poverty.
But will a supersized El Niño persuade countries to make deeper cuts in carbon emissions? In recent months commitments to achieving net zero emissions have waned. But the following economic consequences may encourage some countries to make deeper emissions cuts.
Economic consequences of a Godzilla El Niño

Extreme droughts, heat, wildfires and harvest failures in some areas and extreme rainfall and flooding in others will have severe economic consequences, often for the poorest people. There will be reductions in crop yields and loss of livelihood. Food prices will rise globally. This will add to the inflationary pressures from higher oil prices caused by the Iran war.
Droughts and wildfires in south-east Asia and Australia could have disastrous effects on harvests of palm oil, coffee, cocoa, rice, maize, wheat and various tropical fruits. Droughts and heat reduce output from hydropower and possibly wind energy, and industrial production may slow as a result of extreme heat in workplaces.
In Europe, warmer winters and unusually wet springs promote rapid plant growth. When this is followed by summer heatwaves, the undergrowth dries out and provides fuel for the wildfires. A super El Niño will amplify this. France and Spain have experienced massive wildfires these past few months. In the UK, the 2026 summer has been the hottest on record. The costs in Europe of the heat and wildfires in terms of lost crops and animals have been immense.
Floods and storms damage roads, power grids, railways and buildings. This forces governments to spend money on repairs instead of long-term investments. People are displaced and many are likely to lose their lives.
Fortunately, El Niños fade after a few months to be replaced by the cooler La Niña. The problem is that, with global warming, the next El Niño in a few years could be even more extreme with even more serious economic consequences.
The hope is that governments wake up to the pressing need to reduce carbon emissions.
Videos and podcast
Information
Articles
- Building climate-resilient agriculture in Europe: an economic perspective
European Environment Agency (17/3/26)
- What Super El Niño Means For Business Supply Chains And The Economy
Forbes, Chloe Demrovsky (25/8/26)
- A summer of extremes: Weathering a hotter world
CBS News, Jonathan Vigliotti (16/8/26)
- Area in Europe affected by wildfires could triple due to climate change
The National (UAE), Tariq Tahir (20/8/26)
- El Niño could drag down the global economy by almost $1 trillion or at least $7 trillion—and the choice is ours
Peterson Institute for International Economics, Cullen S Hendrix (26/7/26)
- UN warns of ‘supersized’ El Niño as countries prepare for impact
BBC News, Esme Stallard, Mark Poynting, Becky Dale, Yvette Tan, Tiffanie Turnbull and Nikita Yadav (3/9/26)
- Toxic haze from wildfires spreads across South East Asia as ‘super’ El Niño intensifies
BBC News (2/9/26)
- A Super El Niño is coming: 5 hard‑won lessons the world can learn from Africa
The Conversation, Tafadzwanashe Mabhaudhi and Mendy Ndlovu (5/7/26)
- ‘Supersizing before our eyes’: UN warns of record El Niño approaching
The Guardian, Damian Carrington (3/9/26)
- ‘Super’ El Niño could cause global food price shock lasting into 2028, analysts say
The Guardian, Richard Partington (12/7/26)
- Without action wildfires in Europe will increase 39% even in best-case climate scenario, study finds
The Guardian, Ajit Niranjan (20/8/26)
- From classrooms to climate action: ICSE 2026 charts new path for sustainability
Economic Times (Times of India) (2/9/26)
Questions
- What is the current state of progress towards meeting the goals of the UN Paris Climate Agreement?
- Are there any externalities in consumption that affect global warming?
- How might technological progress make it privately profitable to reduce carbon emissions?
- How might global supply chains and shipping be affected by a super El Niño?
- What role can education play in tackling climate change and its effects?
An investigation by the International Consortium of Investigative Journalists has revealed how more than 1000 businesses from 340 major companies from around the world have used Luxembourg as a base for avoiding huge amounts of tax. Many of the companies are household names, such as Ikea, FedEx, Apple, Pepsi, Coca Cola, Dyson, Amazon, Fiat, Google, Accenture, Burberry, Procter & Gamble, Heinz, JP Morgan, Caterpillar, Deutsche Bank and Starbucks. Through complicated systems of ‘advanced tax agreements’ (ATAs), negotiated with the Luxembourg authorities via accountants PricewaterhouseCoopers (PwC), companies have used various methods of avoiding tax.
Although such measures are legal, they have denied other countries vast amounts of tax revenues on sales generated in their own countries. Instead, the much reduced tax bills have been paid to Luxembourg. The result is that this tiny country, with a population of just 550,000, has, according to the IMF, the highest (nominal) GDP per head in the world (estimated to be $116,752 in 2014).
So what methods do Luxembourg and these multinational companies use to reduce the companies’ tax bills? There are three main methods. All involve having a subsidiary based in Luxembourg: often little more than a small office with one employee, a telephone and a bank account. All involve varieties of transfer pricing: setting prices that the company charges itself in transactions between a subsidiary in Luxembourg and divisions in other countrries.
The first method is the use of internal loans. Companies lend money to themselves, say in the UK, from Luxembourg at high interest rates. The loan interest can be offset against profit in the UK, reducing tax liability to the UK tax authorities. But the interest earned by the Luxembourg subsidiary incurs very low taxes. Profits are thus effectively transferred from the UK to Luxembourg and a much lower tax bill is incurred.
The second involves royalty payments for the use of the company’s brands. These are owned by the Luxembourg subsidiary and the overseas divisions pay the Luxembourg subsidiary large sums for using the logos, designs and brand names. Thus, again, profits are transferred to Luxembourg, where there is a generous tax exemption.
The third involves generous allowances in Luxembourg for losses in the value of investments, even without the company having first to sell the investments. These losses can be offset against future profits, again reducing tax liability. By transferring losses made elsewhere to Luxembourg, again usually by some form of transfer pricing, these can be used to reduce the already small tax bill in Luxembourg even further.
Tax loopholes offered by tax havens, such as Luxembourg, the Cayman Islands and the Channel Islands, are denying exchequers around the world vast sums. Not surprisingly, countries, especially those with large deficits, are concerned to address the issue of tax avoidance by multinationals. This is one item on the agenda of the G20 meeting in Brisbane from the 12 to 16 November 2014.
The problem, however, is that, with countries seeking to attract multinational investment and to gain tax revenues from them, there is an incentive to reduce corporate tax rates. Getting any binding agreement on tax harmonisation, and creating an essentially global single market, is likely, therefore, to prove virtually impossible.
Webcasts and videos
Luxembourg Leaks: Tricks of the Trade ICIJ in partnership with the Pulitzer Center (5/11/14)
Luxembourg ‘abetted’ companies in avoiding taxes France 24, Siobhán Silke (6/11/14)
Tax deals with Luxembourg save companies billions, says report Deutsche Welle, Dagmar Zindel (6/11/14)
Luxembourg: the tax haven and the $870m loan company above a stamp shop The Guardian, John Domokos, Rupert Neate and Simon Bowers (5/11/14)
Luxembourg leaks: nation under spotlight over tax avoidance claims euronews (6/11/14)
Northern and Shell used west Dublin address to cut Luxembourg tax bill on €1bn The Irish Times, Colm Keena (6/11/14)
The ATO’s global tax avoidance investigation ABC News, Phillip Lasker (9/11/14)
Pepsi, IKEA Secret Luxembourg Tax Deals Exposed TheLipTV, Elliot Hill (9/11/14)
Articles
Leaked Docs Expose More Than 340 Companies’ Tax Schemes In Luxembourg Huffington Post, Leslie Wayne, Kelly Carr, Marina Walker Guevara, Mar Cabra and Michael Hudson (5/11/14)
Luxembourg tax files: how tiny state rubber-stamped tax avoidance on an industrial scale The Guardian, Simon Bowers (5/11/14)
Fact and fiction blur in tales of tax avoidance The Guardian (9/11/14)
companies engaged in tax avoidance The Guardian, Michael Safi (6/11/14)
The Guardian view on tax avoidance: Europe must take Luxembourg to task The Guardian, Editorial (6/11/14)
G20 leaders in the mood to act on tax avoidance after Luxembourg leaks Sydney Morning Herald, Tom Allard (6/11/14)
Scale of Luxembourg tax avoidance revealed economia, Oliver Griffin (6/11/14)
EU to press Luxembourg over tax breaks amid fresh allegations BBC News (6/11/14)
Luxembourg leaks: G20 alone can’t stamp out tax avoidance The Conversation, Charles Sampford (7/11/14)
‘Lux leaks’ scandal shows why tax avoidance is a bad idea European Voice, Paige Morrow (8/11/14)
EU to Probe Luxembourg’s ‘Sweetheart Tax Deal’ with Amazon International Business Times, Jerin Mathew (7/10/14)
Investigative Project
Luxembourg Leaks: Global Companies’ Secrets Exposed The International Consortium of Investigative Journalists (5/11/14)
Questions
- Distinguish between tax avoidance and tax evasion. Which of the two is being practised by companies in their arrangements with Luxembourg?
- Explain what is meant by transfer pricing.
- Do a search of companies to find out what parts of their operations as based in Luxembourg.
- In what sense can the setting of corporate taxes be seen as a prisoner’s dilemma game between countries?
- Discuss the merits of changing corporate taxes so that they are based on revenues earned in a country rather than on profits.
- What type of agreement on tax havens is likely to be achieved by the international community?
- Is it desirable for companies to be able to offset losses against future profits?
Finance ministers and central bank officials of the G20 countries are meeting in Sydney from 20 to 23 February. Business leaders from these countries are also attending and have separate meetings.
Amongst the usual discussions at such meetings about how to achieve greater global economic stability and faster and sustained economic growth, there are other more specific agenda issues. At the Sydney meeting these include a roundtable discussion to identify practical solutions to lift infrastructure investment. They also include discussions on how to clamp down on tax avoidance through means such as transfer pricing.
The G20 meetings of finance and business leaders take place annually. There are also annual summits of heads of government (the next being in Brisbane in November 2014).
The G20 was formed in 1999 to extend the work of the G8 developed countries to include other major developed and developing countries plus the EU. In 2008/9 it played a significant role in helping devise policies to tackle the banking crisis and combat the subsequent recession. At the time there was a common purpose, which made devising common policies easier.
Since then, the importance of the G20 has waned. Partly this is because of the divergent problems and issues between members and hence the difficulty of reaching agreements. Partly it is because, to be effective, it needs to remain small but, to be inclusive, it needs to extend beyond the current 20 members. Indeed there has been considerable resentment from many countries outside the G20 that their views are not being represented. Some representatives from non-G20 countries attend meetings on an informal basis.
The following articles discuss the role of the G20 and whether it is fit for purpose.
Articles
Janet Yellen vs. the world: The issues at the G20 finance summit Globe and Mail (Canada), Iain Marlow (20/2/14)
Turning ideas into action at the G20 Business Spectator (Australia), Mike Callaghan (21/2/14)
Boosting infrastructure investment can prove G20’s value to the world The Conversation, Andrew Elek (20/2/14)
Can the G20 ever realise its potential? The Conversation, Mark Beeson (21/2/14)
G20 has failed to fulfil its promise of collaboration amid hostility The Guardian, Larry Elliott (20/2/14)
Official G20 site
G20 Priorities G20
Australia 2014 G20
News G20
Questions
- Which countries are members of the G20? Compile a list of those countries you feel ought to be members of such an organisation.
- What are the arguments for and against increasing the membership of the G20 (or decreasing it)?
- Why is Janet Yellen, Chair of the US Federal Reserve, likely to be at odds with leaders from other G20 countries, especially those from developing countries?
- Why have the tensions between G20 members increased in recent months?
- Discuss possible reforms to the IMF and the G20’s role in promoting such reforms.
- What insights can game theory provide in understanding the difficulties in reaching binding agreements at G20 meetings? Are these difficulties greater at G20 than at G8 meetings?
- Should the G20 be scrapped?
World leaders have been meeting in Rio de Janeiro at a United Nations Conference on Sustainable Development. The conference, dubbed ‘Rio+20’, refers back to the first UN Conference on Environment and Development (UNCED) held in Rio 20 years ago in June 1992.
The 1992 conference adopted an Agenda 21. It was “comprehensive plan of action to be taken globally, nationally and locally by organizations of the United Nations System, Governments, and Major Groups in every area in which human impacts on the environment.”
The 2012 conference has looked at progress, or lack of it, on sustainability and what needs to be done. It has focused on two major themes: “how to build a green economy to achieve sustainable development and lift people out of poverty, including support for developing countries that will allow them to find a green path for development; and how to improve international coordination for sustainable development.” Issues examined have included decent jobs, energy, sustainable cities, food security and sustainable agriculture, water, oceans and disaster readiness.
But just what is meant by sustainable development? The conference defines sustainable development as that which meets the needs of the present without compromising the ability of future generations to meet their own needs. “Seen as the guiding principle for long-term global development, sustainable development consists of three pillars: economic development, social development and environmental protection.”
The articles below look at prospects for national and global sustainability. They also look at a new measure of national wealth, the Inclusive Wealth Index (IWI). This index has been developed under the auspices of the International Human Dimensions Programme on Global Environmental Change (IHDP) and published in its Inclusive Wealth Report 2012 (see report links below).
The IWR 2012 was developed on the notion that current economic production indicators such as gross domestic product (GDP) and the Human Development Index (HDI) are insufficient, as they fail to reflect the state of natural resources or ecological conditions, and focus exclusively on the short term, without indicating whether national policies are sustainable.
The IWR 2012 features an index that measures the wealth of nations by looking into a country’s capital assets, including manufactured, human and natural capital, and its corresponding values: the Inclusive Wealth Index (IWI). Results show changes in inclusive wealth from 1990 to 2008, and include a long-term comparison to GDP for an initial group of 20 countries worldwide, which represent 72% of the world GDP and 56% of the global population. (Click on chart for a larger version.)
So will growth in IWI per capita be a better measure of sustainable development than growth in GDP per capita? The articles also consider this issue.
Articles: summit
Rio+20 deal weakens on energy and water pledges BBC News, Richard Black (17/6/12)
Rio+20: Progress on Earth issues ‘too slow’ – UN chief BBC News, Richard Black (20/6/12)
Rio+20 Earth Summit Q&A The Telegraph, Louise Gray (16/5/12)
Rio+20 Earth Summit: campaigners decry final document Guardian, Jonathan Watts and Liz Ford (23/6/12)
A catastrophe if global warming falls off the international agenda Observer, Will Hutton (24/6/12)
Analysis: Rio +20 – Epic Fail The Bureau of Investigative Journalism Brendan Montague (22/6/12)
Articles: IWI
Accounting for natural wealth gains world traction Atlanta Business NewsKaty Daigle (17/6/12) (see alternatively)
New index shows lower growth for major economies Reuters, Nina Chestney (17/6/12)
A New Balance Sheet for Nations: UNU-IHDP and UNEP Launch Sustainability Index that Looks Beyond GDP EcoSeed (20/6/12)
World’s leading economies lag behind in natural capital Firstpost (18/6/12)
Beyond GDP: Experts preview ‘Inclusive Wealth’ index at Planet under Pressure conference EurekAlert, Terry Collins (28/3/12)
New sustainability index created that looks at more than gross domestic product bits of science (17/6/12)
For Sustainability, Go Beyond Gross Domestic Product Scientific AmericanDavid Biello (17/6/12)
Report
Inclusive Wealth Report 2012: Overview IHDP
Inclusive Wealth Report 2012: Summary for Decision-makers IHDP
Inclusive Wealth Report 2012: full report IHDP
Questions
- What progress has been made towards sustainable development over the past 20 years?
- What are the limitations of conferences such as Rio+20 in trying to achieve global action?
- With the current challenges faced by the eurozone and the global economy more generally, is this a good time to be discussing long-term issues of sustainable development?
- Explain how IWI is derived and measured?
- Looking at the chart above, explain the very different positions of countries in the three columns.
- What are the strengths and weaknesses of using growth in IWI compared with using growth in GDP as measures of (a) economic development; (b) economic wellbeing?
Ministers from around the world met in Durban in the first two weeks of December 2011 to hammer out a deal on tackling climate change. The aim was that this would replace the Kyoto Treaty, due to expire at the end of 2012.
International climate change agreements are particularly difficult to achieve, as there are several market failures involved. Also, there is considerable ‘gaming’, as each country seeks to negotiate a deal that benefits the world as a whole but which minimises the disadvantages to their own particular country.
The conference ended on the 11 December with a last-minute deal. Both developed and developing countries would for the first time work on a legally binding agreement to limit emissions. This would be drawn up by 2015 and to come into force after 2020. The following articles assess the significance of the agreement and whether it represents real progress or little more than a deal to work on a deal.
Articles
‘Modest’ gains as UN climate deal struck Independent (11/12/11)
Landmark deal saves climate talks Irish Examiner (11/12/11)
Durban climate change: the agreement explained The Telegraph, Louise Gray (11/12/11)
Durban climate conference agrees deal to do a deal – now comes the hard part Guardian, Fiona Harvey and Damian Carrington (13/12/11)
Climate deal: A guarantee our children will be worse off than us Guardian, Damian Carrington (11/12/11)
Durban climate deal: the verdict Guardian, Damian Carrington (12/12/11)
Australia hails Cop 17 agreement News 24 Australia (11/12/11)
Climate talks reach new global accord Financial Times, Andrew England and Pilita Clark (11/12/11)
Durban Climate Talks Produce Imperfect Deals Voice of America, Gabe Joselow (11/12/11)
Critics slam climate agreement t Sydney Morning Herald, Arthur Max (11/12/11)
Deal at last at UN climate change talks Euronews on YouTube (11/12/11)
World still in arrears on climate change pledges Reuters Africa, Barbara Lewis (11/12/11)
New UN climate deal struck, critics say gains modest Hindustan Times (11/12/11)
Climate change: ambition gap Guardian (12/12/11)
Canada leaves Kyoto to avoid heavy penalties Financial Times, Bernard Simon (13/12/11)
Durban Platform Leaves World Sleepwalking Towards Four Degrees Warming Middle East North Africa Financial Network, Ben Grossman-Cohen and Georgette Thomas (Oxfam) (13/12/11)
A deal in Durban The Economist (11/12/11)
Assessing the Climate Talks — Did Durban Succeed? Harvard University – Belfer Center for Science and International Affairs – An Economic View of the Environment, Robert Stavins (12/12/11)
Questions
- What was agreed at the Durban Climate Change Conference?
- Why is it difficult to get agreement on measures to tackle climate change? How is game theory relevant to explaining the difficulties in reaching an agreement?
- How would you set about establishing the ‘optimal’ amount of emissions reductions?
- Why will the market fail to provide the optimal amount of emissions reductions?
- Why was it felt not possible for a legally binding international agreement to come into force before 2020?