World leaders attending the G20 Summit pose for a group photo in Rio de Janeiro, Tuesday, Nov. 19, 2024. (AP Photo/Silvia Izquierdo) A sign announces the G20 Summit in Rio de Janeiro, Brazil, Monday,

Britain's Prime Minister Sir Keir Starmer and other leaders of the G20 pose for a photo of the Global Alliance Against Hunger and Poverty at the G20 summit at the Museum of Modern Art in Rio de Janeiro, Brazil. Picture date: Monday November 18, 2024. Stefan Rousseau/Pool via REUTERS

Leaders from the Group of 20 major economies on Monday issued a joint statement highlighting the suffering caused by conflicts in Gaza and Ukraine, while calling for cooperation on climate change, poverty reduction and tax policy.