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.

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.N. talks in Azerbaijan.

United Nations talks on getting money to curb and adapt to climate change resume Monday with fresh hope that negotiators and ministers can work through disagreements and hammer out a deal after slow p

Nations returned Monday to the negotiating table at deadlocked UN climate talks in Azerbaijan, but with time running out hopes of a breakthrough are pinned on G20 leaders meeting in

UN Secretary-General Antonio Guterres on Sunday called on G20 leaders gathering in Rio de Janeiro to rescue stalled concurrent UN climate talks in Azerbaijan by showing "leadership" on cutting emissions.

Negotiations were deadlocked Saturday at the midway point of the UN climate summit, with hopes pinned on G20 leaders intervening to strike a critical finance pact at the crunch talks.