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$57 Trillion Additional Climate Debt Calls for Policy Action by G20

While a drastic reduction in carbon emissions is necessary to contain climate change, countries still have not reached a consensus on a fair division of responsibilities in reducing them. While advanced economies were the biggest emitters in the past, emerging economies, such as China and India, account for an increasing share of new emissions. From the standpoint of fiscal policy, these carbon emissions, which adversely affect the world’s well-being, are a negative externality. At present, countries do not bear the full cost of these externalities. The cumulative sum of these liabilities can be viewed as a “climate debt” a country owes to the global community.