RIO DE JANEIRO: Diplomatic tensions over global warming will take center stage at the G20 summit in Brazil this week. Heads of state arriving in Rio de Janeiro on Sunday (Nov 17) for the G20 summit will spend Monday and Tuesday addressing issues from poverty and hunger to the reform of global institutions. Still, the ongoing UN climate talks have thrown a spotlight on their efforts to tackle global warming. While the COP29 summit in Baku, Azerbaijan, is tasked with agreeing a goal to mobilize