Reuters: A U.N. summit on climate change next week will test rich nations' willingness to fill a near-empty fund to help the poor, but pledges are likely to be far short of developing nations' hopes for $15 billion in 2014. Emerging nations say that cash for the Green Climate Fund (GCF), meant to help the poor with projects to curb rising greenhouse gas emissions and adapt to heatwaves, floods and rising seas, is vital to combat global warming. U.N. Secretary-General Ban Ki-moon wants more than 120 world...