Barack Obama agrees that a deal on climate change must be made Photo: Bloombergpeaking at a special meeting in London to progress the talks, Todd Stern, the US Special Envoy for Climate Change, said Mr Obama agrees that a deal on climate change must be made in December. “If the kind of progress is made that warrants the presence of leaders then we will certainly consider that,” he said. Earlier in the day Gordon Brown, the British Prime Minister, had warned there is “no plan B” if the world fails to stop global warming, and urged Mr Obama to...