Two officials from Brazil and one from another G20 nation say Argentine negotiators are standing in the way of a joint declaration.
G20 summit in Brazil overshadowed by wars and Trump's return, aiming for a deal to fight hunger
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The G20, a group of key developing and industrialized countries that are responsible for four-fifths of all greenhouse gases, said in New Delhi earlier this year that developing countries will need $5.9 trillion by 2030 to meet their climate goals.
Global warming could cost poor countries trillions. They've urged the U.N. climate summit to help
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