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Barbados Prime Minister Mia Amor Mottley spoke passionately to the United Nations General Assembly in September about the mounting debt many developing countries are shouldering and its increasing impact on their ability to thrive. The average debt for low- and middle-income countries, excluding China, reached 42% of their gross national income in 2020, up from 26% in 2011. For countries in Latin America and the Caribbean, the annual payments just to service that debt averaged 30% of their total exports. At the same time, these countries are facing a “triple crisis of climate change, of pandemic and indeed now the conflict that is leading to the inflationary pressures that lead regrettably to people taking circumstances into their own hands,” Mottley said. Rising borrowing costs coupled with high inflation and slow economic growth have left developing countries like hers in a difficult position when it comes to climate change. High debt payments mean countries have...