Guardian: The world was poised to agree an historic deal to tackle global warming tonight, as a last-minute compromise appeared to have saved the UN climate talks. Yvo de Boer, the UN’s top climate official, said countries were on the "brink of agreement" as the discussions dragged on into the early hours of the morning in Bali. The agreement, which lays the foundation for a new worldwide treaty to regulate greenhouse gas emissions, was expected to be finalised tonight. The …