Reuters: The world lacks a sense of urgency over the importance of the U.N. climate change talks in Copenhagen in preventing a “human emergency” affecting hundreds of millions of people, the British government said on Thursday. With United Nations talks on a new deal to combat global warming less than 50 days away, British Foreign Secretary David Miliband said too many people still failed to grasp the scale and urgency of the problem. Climate change will deepen Middle East tensions, …