Kenneth Rogoff|The Guardian

Carbon border taxes alone will not encourage poorer countries to meet climate goals

A coal-based power station in Africa

 There is a gap between the developing world’s ability to deal with climate change and the ambitious plans being discussed in advanced economies. Photograph: Mike Hutchings/Reuters

With the US president-elect Joe Biden’s incoming administration promising a fresh, rational approach to climate change, now is an ideal time to make the case for a World Carbon Bank that would transfer and coordinate aid and technical assistance to help developing countries decarbonise. The proposed Green New Deal in the US and the European commission’s European Green Deal have laudable environmental goals but are too inward-looking. When an entire building is burning, to concentrate firefighting resources on one floor would only delay, not prevent, its destruction.

According to the International Energy Agency, almost all the net growth in carbon dioxide emissions over the next two decades will come from emerging markets. Although China recently pledged to achieve zero net emissions by 2060, it is sobering to consider that it accounts for half of the world’s coal output and half of its coal consumption.

India, too, is highly dependent on its plentiful coal reserves, and will likely remain so despite strong advances in solar power. For all the fanfare accompanying the 2015 Paris climate agreement, the share of clean energy in global energy investment is still only about 34%, almost exactly the level five years ago. Wind and solar account for only 8% of global energy. The IEA estimates that allowing existing power plants to operate for the remainder of their expected lifespans in their current form would by itself cause global temperatures to rise by 1.7C relative to pre-industrial levels.

Right now, the most widely discussed approach to encouraging developing economies to cut their CO2 emissions is a carbon border tax on imports from countries without adequate carbon-pricing systems. The EU is consideringsuch a measure and the Climate Leadership Council (whose members include the incoming US Treasury secretary Janet Yellen) also has advocatedit.

Economists almost universally favour carbon taxes (Europe’s carbon-pricing system is a clumsier version) so that producers and consumers take account of how their actions affect the global commons. A border-tax adjustment is aimed at prodding developing economies to introduce their own carbon taxes. The policy is conceptually sound but is too static and difficult to implement.

For starters, developing economies have neither the resources nor the technology to transform themselves overnight. Part of the reason advanced economies have been able to mitigate their CO2 emissions is that global manufacturing has migrated to emerging markets that have invested heavily in energy.

The average age of coal plants in Asia is 12 years, compared with 43 years in advanced economies. Given that the lifespan of a coal plant is about 50 years, and coal is one of the few natural resources that China and India possess in abundance, the cost to developing Asia of decommissioning its coal plants is huge. And then there is Africa, where the number of people lacking access to electricity has risen during the Covid-19 pandemic, to almost 600 million.

The gap between the developing world’s ability to deal with climate change and the ambitious plans being discussed in advanced economies is just another example of the huge disparity in wealth and resources between the global north and the global south. In response to the coronavirus crisis, for example, advanced economies marshalledfiscal and credit support in 2020 averaging over 16% of GDP, compared with 6% in emerging markets and 2% in developing economies, according to the International Monetary Fund. And this wide gap does not take into account the potential for pandemic-related debt build-ups to morph into a full-blown developing-country debt crisis over the next couple of years, making decarbonisation even more difficult.

Global carbon pricing is an essential part of any long-term solution to the climate crisis but advanced economies need to provide the developing world with a carrot and not just a stick. This should come in the form of highly concessional financing, combined with technical expertise and sharing of best practices – all guided by a World Carbon Bank.

The IMF, the World Bank and regional development banks have an important role to play but their mandates are too diffuse for them to deal effectively with the climate challenge on their own. Meanwhile, those who think that government-to-government assistance should not play any role in climate solutions need to bear in mind that state-owned firms, which are not terribly responsive to economic incentives, increasingly dominate the global coal industry.

Is it too optimistic to think that inwardly focused advanced economies will ever be willing to earmark large amounts of aid – at least $100bn to $200bn a year – to help the developing world meet climate goals? The response to the Covid-19 crisis so far offers little encouragement; the G20’s Debt Service Suspension Initiative has delivered a few billion dollars of relief to 40 very poor countries but that pales in comparison to the trillions that rich countries have spent on their own citizens. An enhanced carbon tax or pricing regime could be one source of sustainable funding over the longer term but the problem is too urgent to wait for this to fall into place.

The goal of achieving zero net CO2 emissions by 2050, which the EU has adopted and the US is likely to do soon, is praiseworthy. But not-in-my-backyard, or nimby, environmentalism is no way to solve a global problem.

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