New York Times: With wounds still raw from the chaotic United Nations climate conference in Copenhagen last December, negotiators are making final preparations for next month’s meeting in Cancún, Mexico, in a surly mood and with little hope for progress. There is no chance of completing a binding global treaty to reduce emissions of climate-altering gases, few if any heads of state are planning to attend, and there are no major new initiatives on the agenda. Copenhagen was crippled by an excess of …