By Jake Spring and Lisandra Paraguassu RIO DE JANEIRO (Reuters) -Diplomatic tensions over global warming will take center stage at the G20 summit in Brazil this week, as negotiators at U.N. talks in Azerbaijan hit an impasse on climate finance that they hope leaders of the world's 20 major economies can break.

G20 sherpas leading the talks in Rio have tried to avoid discussing the wars in advance meetings all year. Now diplomats say they plan to limit any text to a general paragraph bas

G20 Summit Focuses on Global Warming Leaders from the world’s largest economies gathered in Rio for G20 Summit this week to tackle pressing global issues. Among topics like poverty and hunger, climate change emerged as the main point of contention.

By Jake Spring and Lisandra Paraguassu RIO DE JANEIRO (Reuters) -Diplomatic tensions over global warming spilled over into the G20 summit negotiations in Brazil this week, with sources saying the 20 major economies reached a fragile consensus on climate finance that had eluded U.