COP27 entered its final week Monday with rich carbon polluters and developing nations at loggerheads over how to speed up and fund reductions in emissions, as UN chief Antonio Guterres heaped pressure on G20 nations to work together to slow global warming. Guterres was speaking on the Indonesian island of Bali ahead of the annual Group of 20 summit hosted this year by Indonesia, a week after warning a U.N. climate conference in Egypt that the world was “on a highway to climate hell with our foot on the accelerator.” The stand-off at COP27 comes as advanced economies are pressed into acknowledg…