an extraordinary face-to-face encounter between two powerful women, sitting in the midst of a giant huddle in a packed conference hall, finally sealed the Durban climate change agreement as dawn was breaking yesterday, when many had given it up for lost.  after a fortnight of talks and two final all-night negotiating sessions, with the meeting on the edge of collapse, Connie Hedegaard, the Dane who is the European Union's leading climate negotiator, persuaded her Indian opposite number, Jayanthi Natarajan, to accept a form of words meaning that all countries in the world - India included - would be legally bound, in a future climate treaty, to cut their emissions of greenhouse gases.  Ms Natarajan finally agreed to the disputed text despite the fact that her senior officials were telling her she did not have the latitude to do so, and that she had to refer the matter back to the Indian cabinet. Her show of independent-mindedness saved the meeting, and made possible the prospect of a new way forward for dealing with global warming.  The Indians had all along been the main objectors to the idea of a legally binding agreement, and in the early hours proposed text which EU negotiators believed undermined the idea, though you need to be an expert in the arcane dialect of UN treaties to understand this.  They suggested that the new treaty should have "a legal outcome"; but EU negotiators were convinced this could refer merely to decisions of future meetings of the UN Climate Convention such as the Durban one, and