The EU's climate commissioner Wopke Hoekstra says the chance of success at UN climate talks remains "iffy" even after rich nations raised an offer for poorer countries to $300 billion a year by 2035. Asked whether 300 [billion] is as far as the EU will go, Hoekstra replies "No, we're doing everything we can on each of the axes to build bridges and to make this into a success." SOUNDBITES