If Russia’s war in Ukraine significantly reduces grain exports, surging prices could worsen food insecurity, with increases up to 4.6% for corn and 7.2% for wheat. That also would have an environmental impact, with carbon emissions rising as additional land is used to grow crops.If Russia’s war in Ukraine significantly reduces grain exports, surging prices could worsen food insecurity, with increases up to 4.6% for corn and 7.2% for wheat. That also would have an environmental impact, with carbon emissions rising as additional land is used to grow crops.