Associated Press: The Group of Eight industrialized economies and other nations were working Wednesday to commit to a goal of keeping the world’s average temperature from rising more than 2 degrees Celsius (3.6 degrees Fahrenheit) in a bid to contain global warming. The White House declined to comment on whether it would sign off on a statement referring to the temperature threshold. If the deal went through, it would mark a significant step forward since the G-8 has previously refused to adopt that …