The G77 bloc of 134 developing nations, including China, gave the nod for a hard-fought UN climate rescue pact, due to be presented for adoption later Saturday.

"We are united, all together. We are happy to go home with this text," Nozipho Mxakato-Diseko, a South African negotiator and spokeswoman for the G77 group, the biggest in the climate forum, told AFP.