AlertNet: Building a new, ambitious global climate agreement by 2015 will require drawing in China and the United States, and boosting financial help for poor nations so they feel "energised" to act, South Africa's climate change ambassador has said. With China's new leadership under domestic pressure to tackle worsening pollution, and U.S. President Barack Obama promising action on climate change after his re-election, now is the moment to press the world's two biggest greenhouse gas emitters, said Nozipho...