LA Times: We’ve been reserving judgment on last week’s United Nations climate summit in Copenhagen because we’re still trying to figure out what, exactly, happened. An acrimonious two-week negotiations marathon ended Saturday with a raucous final session in which delegates “noted” (but didn’t exactly approve) an agreement seemingly thrown together at the last minute by representatives of the United States and four other big greenhouse-gas emitters. The pact, if you can call it that, has no binding …