BBC: The year’s first round of UN climate talks has ended with delegates talking of a clear split between the visions of developed and developing nations. Developing countries want big emission cuts from rich nations by 2020, as well as finance for climate protection and more transfer of “clean” technologies. The top UN climate official said richer nations should show “more ambition”. The talks in Bonn were the first round in a series aimed at reaching a new global deal by …