Lusaka, Zambia - On the final day of her visit to Zambia, U.S. Treasury Secretary Janet Yellen discussed climate-resilient food production and the global fallout from Russia's war on Ukraine.On her second day in Zambia, Treasury Secretary Janet Yellen said hunger and food insecurity are exerting a heavy toll on communities around the world.Secretary Yellen said it is for this reason the United States is t

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