Geopolitical strife and energy market turmoil have upended prospects for reaching a global agreement to accelerate efforts to limit climate change, with many big economies failing to submit faster timetables for emissions reductions ahead of next week’s United Nations summit. With only days to go before world leaders and negotiators convene in the Egyptian resort town of Sharm El Sheikh for COP27, few countries have followed through on the sweeping agreement struck at last year’s conference in Glasgow. That accord urged national governments to submit more ambitious plans to the U.N. by the end of this year to wean their economies off fossil fuels and take other measures aimed at limiting global warming.

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