Agence France-Presse: A legally binding treaty on climate change remains “some way off,” Australia’s negotiator said Tuesday, as hopes ebb for a breakthrough before December’s summit in Cancun, Mexico. Penny Wong, Australia’s minister for climate change, was in Washington for talks among major economies on whether a treaty was possible in the wake of the turbulent last climate summit in Copenhagen in December. “I think we all know after Copenhagen that the objective of getting a legally binding …