EXPLAINER: Russia's war, climate among vexing issues at G20

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President Joe Biden and other leaders of the Group of 20 top economies will have the chance to discuss the world's most pressing problems at their summit in Bali, Indonesia.

Their talks begin Tuesday under the hopeful theme of "recover together, recover stronger" after the COVID-19 pandemic and its economic consequences. But tensions over Russia's invasion of Ukraine have complicated host Indonesia's efforts to build consensus to tackle climate change, improve food security, build stronger health systems and navigate through the perilous task of taming inflation while trying to steer clear of recessions.