Global leaders will gather in northern Brazil next week to begin the 30th annual Conference of the Parties, or COP30, the United Nations climate summit that takes stock of just how much the world’s nations are doing to address climate change — or, depending on your capacity for optimism, how little.

As U.S. President Donald Trump refutes the legitimacy of global warming — he recently called it the world’s “greatest con job” — his international counterparts are preparing to negotiate the terms of adapting their nations to its consequences. Meanwhile, poor and developing countries, which have contributed comparatively few emissions to the global carbon ledger, have yet to receive the climate-related aid long promised to them by rich and developed countries. This stymies their preparatio

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