Associated Press: Carbon emissions cuts pledged at U.N. climate talks would put the world on "an unsustainable pathway" toward average global warming 50 percent higher than industrial countries want, a confidential U.N. draft document showed Thursday. The document, obtained by The Associated Press, forecast that the average global temperature would rise in coming decades by 3 degrees Celsius (5.4 degrees Fahrenheit) compared to pre-industrial levels. The world has already warmed a bit, so that …