Guardian: Progress towards a global treaty to fight climate change took an important step forward today when the US said it would not demand that China commits to binding cuts of its greenhouse gas emissions. The move came on the last day of the latest round of UN climate change talks involving 183 nations, which aim to produce a deal in Copenhagen in December. Jonathan Pershing, head of the US delegation in Bonn, said developing nations – seeking to grow their economies and alleviate …